bluuebunny/crossref_metadata_2025 huggingface dataset:
INDIRECT INTERACTION BETWEEN ADATOMS ON Ni(100) SURFACE
Authors: LU WEN-CHANG  , ZHANG TAO  , WANG MIAN  ,   河南师范大学物理系
Published: December 2020

The indirect interaction between adatoms are studied by using tight-binding model and one-electron theory. We found that the introduction of impurity atom Cu makes the peak value of the interaction energies to increase, and the introduction of Co makes that value tp decrease. Using the relation between the indirect interaction energies and the relative positions of the adatoms, we explain the structure of H or O monolayer chemisorbed on Ni(l00). In addition, it is found that the interaction energies have a damped oscillation behaviour with the decrease of the coupling strength between the adatoms and the host atoms.
FOURIER TRANSFORM PHOTOTHERMAL IONIZATION SPEC-TROSCOPY OF SHALLOW IMPURITIES IN SEMICONDUCTORS
Authors: YU ZHI-YI  , HUANG YE-XIAO  , CHEN JIAN-XIANG  , YE HONG-JUAN  , SHEN XUE-CHU  , E. E. HALLER  ,   中国科学院上海技术物理研究所红外物理开放研究实验室
Published: December 2020

We report the experimental set-up and measurement system combining with a fast-scan Fourier transform spectrometer for photothermal ionization spectroscopy. They have been successfully applied for the investigation and detection of residual shallow impurity centers in ultra-pure germanium and silicon single crystals with high resolution as well as high sensitivity. Boron acceptor at a concentration of the order of magnitude of 108 cm-3 has been detected in ultra-pure germanium, and the detection limit of at least 107 cm-3 has been demonstrated. Lithiumoxygen donor complex D(Li, O) has been revealed in n-type highpurity silicon. Transition line series of both boron acceptor and phosphorus donor in p-type high-purity silicon have been observed simultaneously with the excitation of intrinsic light. In addition, the transitions associated with higher excited states of shallow impurities in both germanium and silicon have also been observed.
ON THE PHENOMENA OF CHAOS IN A FORCED VIBRATION SYSTEM WITH A SQUARE NONLINEAR TERM
Authors: CHEN LI-QUN  ,   鞍山钢铁学院
Published: December 2020

In this paper, the threshold of chaos in a forced vibration system with a square nonlinear term is given by using the Melnikov method. The effects of parameters on the threshold are analyzed. The known results obtained respectively by approximate 2-D iterated map and by numerically integrating the differential equation are compared with the results here.
THE ORIGIN OF GROWTH-INDUCED MAGNETIC ANISOTROPY IN YIG
Authors: ZENG XUN-YI  , LU XIAO-JIA  , WANG YA-QI  ,   中国科学院上海冶金研究所
Published: December 2020

Quantitative information about tie growth-induced magnetic anisotropy in Y1G was obtained from M?ssbauer spectrum in a previous note. In order to study the origin of this anisotropy, M?ssbauer measurements were extended to low temperatures. We discover that below 170 k, Ku is negative, i-e., there is a spin reorientation. Calculations show that single-ion anisotropy of 0.01/Fe2+ may account for the observed Ku(T), if Fe2+ ions are assumed to occupy preferentially octahedral sites except (1/4 1/4 1/4) and (3/4 3/4 3/4).
DYNAMIC STARK EFFECT ON THE DYNAMICAL BEHAVIORS OF ATOM AND FIELD IN TWO-PHOTON PROCESSES
Authors: HE LIN-SHENG  ,   中国科学院安徽光学精密机械研究所
Published: December 2020

The dynamic Stark effect on the dynamical behaviors of atom and squeezed state field in-two-photon processes is studied by a model consisting of an effective two-level atom with multiple levels and quantized field with single mode. The dynamic Stark effect will cause the decreasing of the revival amplitude and the shortening of the period of the atomic Rabi osoillation of inversion, and the increasing the speed of energy exchange of an atom with the field. This is favorable to the enhancement of the photon antibunching and the narrowing of the Poisson distribution of photons. However, it will make the squeezing of field to decrease, even disappear.
THREE-FREQUENCY QUASIPERIODIC TRANSITION TO CHAOS IN OPTICAL BISTABILITY
Authors: YANG SHI-PING  , DAI JIAN-HUA  , ZHANG HONG-JUN  , YANG CHAO-HUANG  ,   (1)河北师范学院物理系; (2)中国科学院物理研究所
Published: December 2020

The dynamic behavior of a hybrid optical bistability with two delayed feedback loops under the adiabatic approximation condition is studied. In this models, the system can be described by high dimensional mappings. Increasing input intensity while keeping the ratio of two time delays fixed at ω = 3/5, we observe transitions between three-frequency quasiperio-dicity and chaos. This result could be of importance in our understanding of turbulence.
STUDIES OF SURFACE LAYER ATOMIC STRUCTURE OF Al(100) BY MeV ION SCATTERING
Authors: CHENG HUAN-SHENG  , CUI ZHI-XIANG  , XU HONG-JIE  , YAO XIAO-WEI  , YANG FU-JIA  ,   复旦大学
Published: December 2020

The experimental method and facilities for studing surface and interface atomic structure by MeV ion scattering are described. The crystal preparation and cleaning procedure of Al (100) are presented. The MeV ion channeling and scattering experiments indicate the themal vibration amplitude of Al(l00) surface atom is 1.2-1.3 times greater than that of bulk atoms. The relaxation of Al(l00) first layer atom is less then -0.05?.
AN INVESTIGATION OF DENSITY OF GAP STATES IN AMORPHOUS SEMICONDUCTORS BY THERMOSTI-MULATED CONDUCTIVITY SPECTRA
Authors: ZHU MEI-FANG  , XU ZHENG-YI  ,   (1)中国科学技术大学研究生院; (2)中国科学院物理研究所
Published: December 2020

Determination of the density of states in the uper half of gap in a-Si:H film and a-Si:H/a-SiNx: H superlattices were obtained by a more comprehensive theoretical analysis of the thermostimulated comductivity. The results are consistent with that of Fritzsche's analysis. The main features of the two different analytical approaches and the correlation between maximnm chermostimulated current emission energy Em and quasi-Fermi level were discussed. The results show that the thermostimulated conductivity in a-Si: H should be analysed in weak recombination condition. In consequence, retrapping of the thermostimulated carriers can not be negleted. Theory of Gu et al. improves the analysis of measurement of thermostimulated conductivity.
AUGER ELECTRON SPECTROSCOPIC STUDIES OF INTERFA CE AND BURIED LAYER OF SOI STRUCTURE FORMED BY ION IMPLANTATION
Authors: YU YUE-HUI  , LIN CHENG-LU  , ZHANG SHUN-KAI  , FANG ZI-ZEI  , ZOU SHI-CHANG  ,   中国科学院上海冶金研究所离子束开放研究实验室
Published: December 2020

The chemical composition and interface structure of silicon on insulator (SOI) formed by O+ (200 keV, 1.8×l018/cm-2) or N+ (190 keV, 1.8×1018/cm-2) implanted into silicon have been investigated by using Auger electron spectroscopy (AES) with in situ sputtering. For SOI structure produced by O+ implantation and annealing at 1300℃ for 5 hours, the characteristic Auger spectrum for the interface between the top silicon layer and the buried oxide layer was measured and a chemical state of silicon was identified, whose major transition was at 85 eV, different from that of the bulk silicon or silicon in SiO2. This chemical state was also discovered in the buried oxide layer. For SOI structure produced by N+ implantation and annealing at 1200℃ for 2 hours, a nitrogenrich porous layer was observed in the buried nitride layer. For both SOI structures, the strong asymmetry of the two main interfaces was observed. These results are in agreement with the results of infrared absorption (IR) analysis and transimission electron microscopy (TEM) analysis. The detailed explanation of these results is also presented in this paper.
ANALYTICAL ELECTRON MICROSCOPY OF DEFECTS IN PHOTOREFRACTIVE BaTiO3 CRYSTAL
Authors: YANG CUI-YING  , ZHANG DAO-FAN  , WU XING  , ZHOU YU-QING  , FENG GUO-GUANG  ,   (1)中国科学院物理研究所; (2)中国科学院物理研究所,北京电子显微镜实验室
Published: December 2020

Defects in photorefractive BaTiO3 crystal, obtained by the top seed solution growth method, have been studied by analytical electron microscopy. Thin foils containing inclusions for transmission electron micrsocopy (TEM) were prepared by ion milling the mechanically polished thin sections. Combining diffraction and electron energy loss spectroscopy in a TEM, the inclusions were identified as amorphous Ba-Ti-O and Ba6Ti17O40. Other microdefects which are only visible in the TEM have been identified as crystalline precipitates.
A SLAVE-BOSON MEAN FIELD THEORY FOR THE HEAVY-FERMION ALLOYS
Authors: LI ZHENG-ZHONG  , ZHOU QING-CHUN  , QIU YANG  ,   南京大学物理系
Published: December 2020

In this article, a theory describing the normal state of the heavy-fermion alloys has been proposed based on the Yoshimorikasai model in the framework of slave-boson mean field theory by using the CPA method. The density of states (DOS) and its concentration dependences for the conduction electrons and strong correlated f-electrons in the heavy-fermion alloys are calculated self-consistently. The results we obtained not only reveal the process of the pseudo-gap formation in the DOS, but also give a reasonable explanation of the low temperature coherence effects in specific heat and thermoelectric power for the heavy-fermion alloys.
INDUCED ANISOTROPY IN Co-Zr AMORPHOUS FILMS
Authors: GUAN PENG  , LIU YI-HUA  , GUO YI-CHENG  ,   山东大学物理系
Published: December 2020

The thermal stability of the uniaxial anisotropies in Co86 Zr14 and Co91 Zr9 amorphous films prepared by rf sputtering are investigated through isothermal annealing in a static magnetic field. It is found that the stability is improved with increasing content of Zr. The relaxation curves have been fitted with calculated ones assuming the lognormal distribution of activation energy. The mean value of activation energy has been estimated at 2.5 eV for Co86 Zr14 and 1.7 eV for Co91 Zr9 films, respectively. The anisotropy increases with decreasing metal content, that can be explained by the precipitation caused by the nonmagnetic interaction in amorphous alloys.
DETERMINATION OF DIFFUSION COEFFICIENT AND QUENCHING RATE COEFFICIENT OF METASTABLE N2 MOLECULES N2(A3∑u+) USING TOWNSEND DISCHARGING
Authors: HU XIAO-YONG  , H. ITOH  , N. IKUTA  ,   (1)哈尔滨工业大学; (2)日本德岛大学; (3)日本千叶工业大学
Published: December 2020

The diffusion coefficient Dm and quenching rate coefficient Kq of metastable nitrogen molecule N2(A3∑u+) in pure N2 has been determined using Townsend dischaging. The values of Dm of 128 cm2/s and KN2 of 8.1×10-19 cm3/s were obtained respectively.
ATOMIC SQUEEZING EFFECTS IN THE TWO-PHOTON JAYNES-CUMMINGS MODEL
Authors: ZHOU PENG  , PENG JIN-SHENG  ,   华中师范大学物理系
Published: December 2020

The laws with which the state vector of the two-photon Jaynes-Cummings model varies with the time are studies by means of the time-evolution operator. The statistical properties of atoms are discussed. The atomic squeezing effects are revealed.
AUTOIONIZATION SPECTRA OF 4dnp AND 4dnf,J=1 SERIES OF Sr Ⅰ
Authors: ZHANG SEN  , MEI SHI-MIN  , QIU JI-ZHEN  , XU YUN-FEI  ,   浙江大学物理系,杭州,310027
Published: December 2020

The autoionization spectra of the 4dnp and 4dnf, J=1 series of Sr atom have been observed in the range of 59570-60300cm-1 using three-step laser excitation method. 60 lines have been obtained, most of them can be classified into six series converging to the 4d2D3/2 and 4d2D5/2 ionization thresholds, respectively. The profile of the line and configuration interaction are also discussed.
THE TIME-SPACE STRUCTURE EVOLUTION OF TOKAMAK PLASMA UNDER THE MUTUAL INTERACTIONS OF TEARING MODE WITH TRANSPORT PROCESS
Authors: ZHANG CHENG  , DENG XIAO-HUA  , HUO YU-PING  ,   中国科学院等离子体物理研究所,合肥,230031
Published: December 2020

This paper presents a theoretical study of the evolution of tearing modes in tokamak. plasma. Combining the tearing mode with a 1-D transport code, computer simulations are conducted. The result shows that the transport process plays an important role in the development of the macro-instability. Under the mutual interaction of macro-instability and transport process, the MHD pattern of tokamak presents various space and time structure. That also gives rise to the time and space behavior of other plasma parameters such as temperature and density.
MAGNETIC FIELD ASSISTED MICROWAVE PLASMA AND LARGE AREA DIAMOND FILM DEPOSITION
Authors: SONG RU-AN  , CHENG XIAN-AN  , ZHOU ZHONG-YI  ,   (1)北京航空航天大学应用数理系,北京,100083; (2)北京计算机学院,北京,100044; (3)中国科学院电子学研究所,北京,100080
Published: December 2020

Under the assistance of magnetic field, the electron cyclotron resonance effect generates a high density plasma in a large spaceregion This offers an beneficial condition for large area diamond films deposition. By using a mixture of methane (CH4) and hydrogen (H2), a diamond film of 5 cm diameter has been grown on silicon substrate under the pressure about 3 Torr which is considerably lower than the pressure in all other methods recently used. In view of the spacial extent of the plasma, we see that it is possible to further increase the area of deposited diamond film. The growth condition of diamond film in gas phase deposition under the pressure of 0.5 to 50 Torr has been discussed on the basis of analyzing the optical emission spectrum of the plasma.
ELECTRONIC STRUCTURE OF JAHN-TELLER DISTORTED PHOSPOROUS-VACANCY COMPLEX IN SILICON
Authors: SHEN SAN-GUO  , FAN XI-QING  ,   郑州大学物理系,郑州,450052
Published: December 2020

Under the extended defect potential approximation, the electronic wave function which is a function of the PV defect energy has been derived using a tight binding Koster-Slater Green function technique. Taking the experimental value of the defect energy level as input parameter, the obtained wave function describes quantitatively the data of the electron paramagnetic resonance and electron-nuclear double resonance. Especially, the hyperfine interaction constants of the four nearest neighbor atoms around the vacancy given by the theory, are in good agreement with the experiment.
CHAOTIC MEASURES AND SCALING LAWS FOR SUPERCRITICAL CIRCLE MAP
Authors: WANG GUANG-RUI  , CHEN SHI-GANG  ,   应用物理与计算数学研究所,北京,100088
Published: December 2020

In this paper, we investigate the behaviour of the chaotic motions when parameter k>1 and k》1 for the circle map. We give out the measures of the chaos and it's scaling laws, by the methods of calculating the Lyaponov exponents and winding number for isometric point on Ω axis.
X-RAY LASER GAIN MEASUREMENTS AND BEAM OPTICS DIAGNOSTICS IN Ne-LIKE Ge
Authors: HE SHAO-TANG  , HE AN  , CHUNYU SHOTAI  , SHEN HUA-ZHONO  ,   西南核物理与化学研究所,成都,610003
Published: December 2020

The X-ray laser investigations in Ne-Like Ge were carried out using Shengguang (1012W) laser facility. An 1 m packaged grazing incidence grating spectrograph was positioned to view the plasma axially. The gain coefficients and the beam patterns were obtained from lasing line spectra. The measured gain coefficients of 19.638, 23.224, 23.627, 24.743 and 28.643 nm lasing lines were 3.06, 3.99, 3.72, 2.36 and 4.59 cm-1 respectively, the diverence angles of X-ray laser beams were about 12 mrad, the angles of X-ray laser beams from the axis of the line focus plasma were about 5.7 mrad.
STUDY OF OPTIC AL-PHONON DEFORMATION POTENTIALS IN Ga1-xAlxAs
Authors: WANG REN-ZHI  , HUANG MEI-CHUN  ,   (1)厦门大学物理系,厦门,361005; (2)中国高等科学技术中心(世界实验室)理论物理分中心
Published: December 2020

The optical-phonon deformation potentials (ODP's) of the tranary compounds Ga1-xAlxAs have been calculated by LMTO-ASA band structure technique combining with a virtual crystal approximation and a frozen-phonon model. The ODP's as a function of the Al composition x has been predicted. We find that the ODP's d0,d30,d10(val)and d10(cond) can be expressed as a quadratic equation of the compositions. Among them a small bending parameter is only connected with the d0 vs x, showing it to be a nearly linear dependence. The computational results also show that the d10(val) will equal to the d10(cond) at x≈0.65. So the ratio d30/d10 should be divergent at that composition. This fact implies that the contribution of the two-band term to the Raman tensor of the first-order resonance Raman scattering for energy gap E1-E1+△1 can be neglected at that composition in Ga1-xAlxAs. The reliability of our calculation results has been verified by using the relationship between the ODP's.
AN INVESTIGATION ON OPTICAL ISODENSITY PERFORMANCE OF CRYSTAL BSO
Authors: ZHU WEI-LI  , CHEN YAN-SONG  ,   (1)中国科学院物理研究所,北京,100080; (2)中央民族学院,北京,100081
Published: December 2020

In the experimental study on electro-optical non linearity of crystal BSO, we observed that this crystal exhibits an optical isodensily performance when an external voltage is applied. In this paper the physical mechanism of this behavior is considered on the base of optical non-linearity of photorefractive crystal, and the experimental data, as well as the experimental results of several images, are given.
UNIVERSAL COORDINATE TRANSFORMATION LEADING TO HAWKING EFFECT
Authors: ZHAO ZHENG  ,   北京师范大学物理系,北京,100875
Published: December 2020

A universal coordinate transformation leading to Hawking effect is obtained from only a few conditions whose physical meaning is clear. It is pointed out that the separation of the time variable and the space variable in the coordinate transformation is a sufficient condition for introducing the thermal effect when the new space-time is stationary and time-orthogonal. It is inferred that the "separation" in the coordinate transformation may be regarded as a new representation of the fundamental postulate upon which statistical mechanics is built.
THE PROPAGATION EFFECT OF COHERENT PULSE IN THE STRONG LOSS MEDIUM
Authors: JIANG MENG-HENG  , LIN FU-CHENG  ,   中国科学院上海光学精密机械研究所,上海,201800
Published: December 2020

By means of the density matrixs in forms of Bloch equations which are coupled with Maxwell equations, we treated propagation effect of coherent pulse in the strong loss medium. Both pulse evolution and its influence on the medium have been studied. We observed the special transient coherent phenomena of pulse in the strong loss medium which include the stepwise decreasing of pulse area and periodic oscillation of number of spatial ionized particles.
SEMICLASSICAL THEORY OF THE TRISTABLE PHENOMENA IN ARGON DISCHARGE PLASMA
Authors: WANG HAI-DA  ,   中国科学技术大学近代物理系,合肥,230026
Published: December 2020

In accordance with the experiment results of the tristable phenomena in argon discharge plasma in a double plasma device, the related semiclassical theory based on the fundamental physical processes, such as ionization, recombination, excitation and deexcitation, are established.
THE WORK-FUNCTION CHANGE OF K/Cu(111)
Authors: WANG GENG  , LI HAI-YANG  , XU YA-BO  ,   (1)浙江大学物理系,杭州310027; (2)浙江大学物理系,杭州310027,中国科学院半导体研究所,北京,100080
Published: December 2020

The work-function change of potassium on the Cu(111) surface was studied. The work-function change was measured by a Kelvin probe. The coverage of potassium on the surface was determined by AES. Maximum work-function change Δφmax=3.14 eV. Initial dipole moment p(0) = 7.0 Debye, The minimum work-function occurs at the coverage θmin= 0.18. The result of this work is consistent with that of the jellium-slab model.
AMPLITUDES OF ELECTRONIC WAVEFUNCTIONS AT NUCLEI FOR ATOMS (II)——AMPLITUDES OF ELECTRONIC WAVEFUNCTIONS AT NUCLEI FOR ATOMIC IONS
Authors: LIU LEI  , LI JIA-MING  ,   中国科学院物理研究所,北京,100080
Published: December 2020

Based on the atomic self-consistent-field theory, we have performed relativistic calculations for reduced normalization factors of occupied shell wavef unctions of all atomic ions up to Z = 95. Their dependance on the atomic number and the degree of ionization are elucidated.
A STUDY ON THE SPECTRA OF SELF-SIMILAR TIME INFORMATIONS
Authors: ZHONG XI-HUA  , ZHOU YUE-MING  , ZHU YA-FEN  ,   (1)北京大学地球物理系,北京,100871; (2)北京大学物理系,北京,100871
Published: December 2020

In this paper, three modes of self-similar time informations on Cantor's fractal axis are constructed. Based upon a theoretical view point of generative production, we have found the recurrence formulae of spectral structure factor and shape factor of them, and plotted four series of spectral curves. By the comparison and progression of spectral curves, it can be seen that the structure factors play the ground role and the shape factors play the modulatory role, and there are competitive phenomena between generations. This investigation provides a basis for further understandng of the characteristics of self-similar informations by a new representation such as frequency domain.
A PERTURBATION METHOD FOR THE NONLINEAR DRIFT WAVES DRIVEN BY A SINUSOIDAL WAVE
Authors: HE KAI-FEN  , HU GANG  ,   (1)北京师范大学低能核物理研究所,北京,100875; (2)北京师范大学物理系,北京,100875
Published: December 2020

The nonlinear drift-wave equation driven by a sinusoidal wave is discussed in a coordinate system moving in the driving phase speed. It is shown that the hysteretic jump of the wave energy and its transition to periodic motions from the steady state can be described integrately by the perturbation method proposed in this paper. The saddle-node and Hopf bifurcations of certain resonance mode are responsible for them respectively. The frequency of the periodic oscillatory wave energy is relevant to the eigen-frequency of the system, which is different from the one in the laboratory frame due to the Doppler shift and the nonlinea-rity.
AUGMENTED SPHERICAL WAVE FIRST-PRINCIPLE CALCULATION ON THE STACKING-FAULT ENERGY OF ALUMINIUM
Authors: JIN QING-HUA  , WANG PING-JI  , DING DA-TONG  , WANG DING-SHENG  ,   (1)南开大学物理系,天津300071; (2)中国科学院物理研究所,北京100080
Published: December 2020

The stacking-faults are placed in a supercell which is repeated periodically. By choosing the supercell large enough, so that faults in neighboring cells do not interact much, the energy of one stacking fault may then be calculated. A first principle method (Augmented Spherical Wave Method) is used to calculate the energies of the intrinsic and extrinsic stacking faults in aluminium. The values found are ΓISF=154erg/cm2 and ΓESF=138erg/cm2 respectively. The results are quite reasonable as compared with experimental data.
BIFURCATION STRUCTURE AND SCALING PROPERTY OF DUFFING'S EQUATION
Authors: ZHU SHUN-QUAN  , XIE FA-GENG  , HU GANG  ,   (1)北京师范大学物理系,北京100875; (2)北京师范大学物理系,北京100875;中国科学院理论物理研究所,北京100080; (3)西南师范大学物理系,重庆630175
Published: December 2020

Symmetric cubic Duffing's equation can be identified to three-parameter equation by using scaling transformation. Duffing's equation with, negative linear term has a closed bifurcation region under weak periodic force, the bifurcation areas contract with increasing the linear coefficient. The equation has a set of self-similar bifurcation regions under strong periodic force. The scaling property of this regions is found and discussed in terms of a one-dimensional map, the theoretical result is in good agreement with the computational result.
ISOTHERMAL AGING OF PERMEABILITY OF AMORPHOUS Fe-Ni-Si-B ALLOYS
Authors: WANG ZHI  , HE KAI-VUAN  ,   (1)东北工学院材料科学与工程系,沈阳110006; (2)东北工学院材料科学与工程系,沈阳110006;天津理工学院材料研究中心,天津300191
Published: December 2020

Changes of permeability have been measured for as-received amorphous (Fe1-xNix)76Si8B16 alloys after aging for different times at relative low temperatures (65-150℃). The results indicate that the permeability is almost unchanged after aging below 65℃ but it varies obviously above 100℃. The changes of permeability are dependent on the alloy compositions and can be interpreted in terms of the changes of stress, magnetostriction and induced magnetic anisotropy during aging.
TEMPERATURE EFFECTS ON THE INTERACTION BETWEEN P AND GaAs(lOO) SURFACE
Authors: LU XUE-KUN  , HAO PING-HAI  , HE ZHONG-QING  , HOU XIAO-YUAN  , DING XUN-MIN  ,   复旦大学应用表面物理国家重点实验室,上海200433
Published: December 2020

Temperature effects on interaction between P and GaAs (100) surface have been studied by in-situ X-ray photoemssion, uhra violet photcemission, high resolution electron energy loss specrroscopy and low energy electron diffraction techniques. The results show that annealing will make most of the amorphous P, which are deposited on GaAs(lOO) surface at room temperature, desorb with some randomly distributed P-clusters left on the surface. In these clusters, some of the P atoms are bonded to the Ga atoms of the substrate, others exist in the form of element. Higher temperature annealing will make all the left P atoms interact with the substrate and form GaAsP thin layer. Film of GaAsP solid solution will be obtained when depositing P on high temperature GaAs substrate. This film is suggested to be a promissing passi-vating film for GaAs surface.
A PERTURBATIVE VARIATIONAL ANALYSIS ON INTERAC-TION OF TWO SOLITARY WAVES IN TROUGH RESONATOR
Authors: CHEN LU-JUN  , LIANG CHANG-HONG  , WU HONG-SHI  ,   西安电子科技大学,西安710071
Published: December 2020

The phenomenon observed by Wu et al., which takes place in the interation of two nonpropagating solitary waves in a trough resonator, is analytically analyed by the perturba-tive variational analysis. The coalescence period and the first-coalescence-time for in-phase solitary waves as well as the interaction forces and the interaction potential existing between two solitons are given, providing a partical description for the interaction between two non-propagating solitary waves.
CONSTITUTION OF THE MODEL OF NONEQUILIBRIUM PHASE TRANSITION BY THE CELLULAR AUTOMATA APPROACH
Authors: LI FU-BIN  ,   华东理论物理研究所,上海200237;中国高等科学技术中心世界实验室,北京100080
Published: December 2020

It is shown that, for a realistic problem, how to construct the Cellular Automata rules and what can be done once these rules are given We have constituted the model of nonequilibrium phase by the Cellular Automata approach. A mean-field-like approximation is discussed and its predictions are compared with the exact numerical results for the model.
DEEP LEVEL IN BOTH Si/SiO2 INTERFACE AND ITS NEIGH-BOURHOOD AND Si/SiO2 INTERFACE STATES IN p TYPE SILICON MOS STRUCTURE
Authors: CHEN KAI-MAO  , WU LAN-QING  , PENG QING-ZHI  , LIU HONG-FEI  ,   (1)北京大学物理系,北京100871; (2)北京有色金属研究总院,北京100088
Published: December 2020

The deep level in both Si/SiO2 interface and its neighbourhood and Si/SiO2 interface states have been studied systematically with Deep Level Transient Spectroscopy (DLTS). Experimental results show that a dominant deep level, H (0.494), exits in both Si/SiO2 interface and its neighborhood in MOS structure formed by thermal oxidation. The deep level possesses some interesting properties, for example, its DLTS peak height depends strongly on temperature, and when the gate voltage reduces the interval between. Fermi-level and Si valence band to a value less than that between the deep level and Si valence band, its sharp DLTS peak is still observable. The hole capture cross section of the interface states at Si/SiO2 interface has been found to depend on temperature, measured with a new method. The energy distribution of the interface states measured with DLTS contradicts to the distribution obtained by quasistatic C-V technique. A new physical model of Si/SiO2 interface was proposed, with this model the above stated experimental results can be successfully expounded.
DEFECT OF SYMMETRY OF THE TIME-MEAN-INTERACTION-FIELD BETWEEN AN OSCILLATING KINK AND POINT DEFECT AND SELF-ORGANIZATION PHENOMENON
Authors: SUN ZONG-QI  ,   中国科学院金属研究所,沈阳110015
Published: December 2020

The elastic interaction force field and rigidity field between kinds on screw dislocation and a substitutional foreign atom were calculated with isotropic elastical approximation.The time-mean-interaction-potential of a harmonic oscillating kink along the tube of the screw dislocation was calculated. There appeared a defect of symmetry of the mean potential at the amplitude larger than a critical amplitude. Double peaks of potential instead of a single peak occured. The center of the kink turned the lowest energy position for the substitutional atom into an instable position.The range of parameters in favor of the transition of the diffusional self-organization along the tube of screw dislocation, to form an atmosphere with double maximums of concentration, aud of the harmonic oscillation to flip-flop of the kink was estimated.
QUASI-HYDROSTAT1CALLY COLD-PRESSED Bi0.8Pb0.2SrCaCu2Ox SUPERCONDUCTORS
Authors: WU BING-QING  , WANG WEN-KUI  , JIN CHANG-QING  , LIU WEI  , LI FANG-HUA  , LIU SHI-CHAO  , LIU ZHEN-XING  , ZHAO ZHONG-XIAN  , YAO YU-SHU  ,   (1)中国科学院表面物理国家重点实验室,北京100080; (2)中国科学院超导国家重点实验室,北京100080; (3)中国科学院物理研究所,北京100080
Published: December 2020

The effects of quasi-hydrostatic pressure treatments on the Bi-system superconductors were investigated The cold-pressing treatments seriously weakened the inter-granular weaklinks and induced a large number of intragranular defects, resulting in the deterioration of the suprcon-ducting properties. The targe increase in the bulk density and the orientation of the superconducting grains were also observed in the cold-pressed samples. These drastic changes of superconductivity were mainly due to the shear stress under quasi-hydrostatic pressure. The post annealing treatments greatly enhanced the weaklinks and caused the partial recovery and the agglomeration of some defects. By coldpressing-annealing method, Jc (77 K, zero field) was raised to about 1600A/cm2. The pressure dependence of Tc under hydrostatic pressure was also investigated and dTc/dp was found to be 1.4K/GPa.
GROWTH OF 2223 PHASE IN Bi1.92Pb0.32Sr2Ca1.7Mg0.3Cu3.07Ox SUPERCONDUCTOR IN THE PROCESS OF SOLID STATE REACTION
Authors: CHU SHAO-YAN  , WANG XU-WEI  , CHENG XIAN-AN  , LI CUN-JIAN  , WANG JUN-KUI  , WU QIAN-ZHANG  , HUANG JIA-SHAN  ,   (1)北京航空航天大学应用数理系,北京100083; (2)中国地质科学院矿床研究所,北京100037; (3)中国科学院物理研究所,北京100080
Published: December 2020

Samples with nominal composition Bi1.92Pb0.32Sr2Ca1.7Mg0.3Cu3.07Ox were synthesized by solid state reaction. The results of XRD, SEM, EDAX and ac susceptibility measurement on the block and the power samples showed that in the samples there coexisted the 110K and 85K superconducting phases. The 2223 phase (110K) is considered to form at first at boundaries and in the outer region of the crystals of the 2212 phase (85K). We also believe that the origin of the structure of 2223 phase may initally exist in the 2212 phase grains and dact ad certain kind of stacking faults, and the 2223 phase finally forms and grows through the intercalation of the CaCuO2 layers in the crystal lattice of the 2212 phase together with climbing of dislocations. A calculation pased on experimental data supports this point of view.
MeV PROTON ELASTIC BACKSCATTERING ANALYSIS OF SiNx/Si AND SiOx/Si FILMS
Authors: ZHU FEI-RAN  , JIANG WEI-LIN  , XU TIAN-BING  , YIN SHI-DUAN  ,   (1)中国科学院半导体研究所,北京100083; (2)中国科学院物理研究所,北京100080
Published: December 2020

A simple method for the analysis of concentration ratios N/Si and O/Si in SiNx/Si and SiOx/Si is presented. 1.95 MeV H beam elastic backscattering was used to determine the composition and thickness. A comparison with 2.1 MeV He beam Rutherford backscsttering (RBS) is given. It provides a complementary analysis technique. A brief discussion on results is given.
A STUDY ON THE THERMODYNAMICAL PROPERTIES OF ONE-DIMENSIONAL FIBONACCI QUASIPERIODIC FRUSTRATED ISING MODEL
Authors: TONG PEI-QING  ,   南京师范大学物理系,南京210024
Published: December 2020

The calculated formula for partition function of one-Dimensional Fibonacci quasiperiodic frustrated Ising system with free and periodic boundary conditions are given in this paper. Its thermodynamical properties at low temperatures are studied. It is found that when the temperature tends to zero , the thermodynamical quantities as the functions of B/J show discontinuities at B/J=2/(2m+l) (m interger). The ground state configuration of system in various parameter regions are described and the results of calculation are discussed.
HAWKING-UNRUH THERMAL EFFECT AND FOUR-COMPONENT WAVE FUNCTION OF DIRAC SPINOR PARTICLES IN NON-STATIC RINDLER SPACE-TIME
Authors: BAO AI-DONG  , ZHU JIAN-YANG  , ZHAO ZHENG  ,   (1)北京师范大学物理系,北京100875; (2)北京师范大学物理系,北京100875;抚州师范专科学校物理系,抚州344000
Published: December 2020

The dynamical properties of Dirac spinor particles in a non-static Rindler space-time is studied. The explicit representative of the four-component wave function of Dirac particles is obtained. A non-uniformly rectilinearly accelerating Rindler observer is accompanied by an event horizon depending on time. He explores some thermal radiation varying with time, whose temperature is proportional to the simultaneous acceleration. The existence of the non-static Rindler effect is confirmed.
ANALYSIS OF CYLINDRICAL DIELECTRIC LOADED SLOW-WAVE FREE-ELECTRON LASER
Authors: LING GEN-SHEN  , QIAN BAO-LIANG  , CHEN DE-MING  , LI CHUAN-LU  , LIU YONG-GUI  ,   国防科技大学应用物理系,长沙410073
Published: December 2020

The free electorn laser with cylindrical waveguide loaded with dielectric is studied by us-ing theory of fluids. It is shown that the main mode of super-radiation in this system is TE mode. It has all the characters of slow-wave free electron laser.
RESONANT RAMAN SCATTERING IN (CdSe)1(ZnSe)3/ZnSe SHORT-PERIOD SUPERLATTICE MULTIPLE QUANTUM WELLS
Authors: HOU YONG-TIAN  , HE GUO-SAN  , ZHANG SHU-LIN  , PENG ZHONG-LING  , LI JIE  , YUAN SHI-XIN  ,   (1)北京大学物理系,北京100871; (2)中国科学院上海技术物理研究所,上海200083
Published: December 2020

In (CdSe)1(ZnSe)3/ZnSe short-period superlattice multiple quantum wells, we observed the Raman scattering from ZnSe confined longitudinal optical phonon modes in both the barriers and wells of quantum wells under different resonant conditions. From comparison between theoretical analysis with linear chain model and experimental results, the observed ZnSe confined longitudinal optical phonon mode in the both configuration are shown to be LO1 This differs from the observations in GaAs/AlAs quantum wells and we tentatively attribute the disagreement to the different subband structures in our sample.
INVESTIGATION OF DOUBLE EXPLODING FOIL EXPERIMENT ON INNER-SHELL PHOTOIONIZATION X-RAY LASER SCHEME
Authors: HE SHAO-TANG  , CHUNYU SHUTAI  , SHEN HUA-ZHONG  , YOU YONG-LU  , ZHANG QI-REN  , DU FENG-YING  , GU YUAN-YUAN  , YANG SHANG-JIN  , HUANG WEN-ZHONG  , CAI YU-QIN  , KONG LING-HUA  , GU YU-QIU  , SUN YONG-LIANG  , HE AN  , LIU SU  ,   西南核物理与化学研究所,成都610003
Published: December 2020

This paper presents the methods and a part of measurement result about exploration of double exploding foil experiment on inner-shell photoionization X-ray laser scheme. The results show that the line intesities of transitions 3d104p-3d94s2 for Cu-like Pd and Ag ions could be enhanced by the kilovolt pumping X-ray produced in laser-heated NaF and Cu plasmas , but still could not be amplified to form a laser output.
A STUDY OF OPTICAL ABSORPTION SPECTRA OF NANO-CRYSTALLINE SILICON FILMS
Authors: LIU XIANG-NA  , HE YU-LIANG  , F. WANG  , R. SCHWARZ  ,   (1)Physics Department E16,Technical University of Munich,W-8046 Garching,Germany; (2)南京大学物理系固体微结构物理国家重点实验室,南京210008; (3)南京大学物理系固体微结构物理国家重点实验室,南京210008;北京航空航天大学非晶态物理研究室,北京100083
Published: December 2020

We employed the constant photo-conductivity method (CPM) to measure the optical absorption spectra of nano-crystalline siilicon films (nc-Si :H) in the energy range of 0. 9-2. 5eV. We analysed some possible major optical transition processes resulting from the photo-conductivity at different photon energy range and the variation of optical absorption spectra while the films were transformed from amorphous silicon into microcrystalline silicon and then nano- crystalline silicon films. We found that the carriers' optical transition and transport process at the interfaces between grains play an important role in the optical absorption spectra in the whole energy range. We make use of the novel structure of nc-Si:H films to explain our experimental results.
BOND VALENCE CHARACTER AND SUPERCONDUCTIVITY IN Y1-xPrxBa2Cu3O7-δ SYSTEM
Authors: ZHANG XIAO-JUN  , WANG JIN-SONG  , XU ZHU-AN  , ZHANG QI-RUI  ,   浙江大学物理系,杭州310027
Published: December 2020

Based on data of neutron diffraction measurements, the oxidation states in Y1-xPrxBa2Cu3O7-δ system are determined by bond valence sums (BVS) calculation. It is found that a close correlation between the BVS value of Cu(2) and superconducting critical temperature (Tc) exists. We believe that the increase of Pr content leads to the variation of charge distribution when the content of oxygen remains almost constant. At the same time ,the BVS value of Cu(l) and Cu(2) decreases,while that of Y(Pr) increases,and the holes in CuO2 plane are partly localized in Pr-O bond. The quenching of superconductivity by Pr ions is mainly attributed to this localization of the holes in CuO2 plane by Pr ions.
STRUCTURE AND MAGNETIC PROPERTIES OF Ho2Fe17Cx
Authors: SHEN BAO-GEN  , KONG LIN-SHU  , CAO LEI  , GONG HUA-YANG  , WANG FANG-WEI  , ZHAN WEN-SHAN  , GUO HUI-QUN  , ZHAO JIAN-GAO  ,   中国科学院物理研究所磁学国家重点实验室,北京100080
Published: December 2020

Formation,structure and magnetic properties of Ho2Fe17Cx compounds prepared by melt-spinning were studied. These carbides are found to be stable at high temperature. Their crystal structure changes from the hexagonal Th2Zn17-type to rhombohedral Th2Zn17-type,as x increases. Saturation magnetization of Ho2Fe17Cx compounds at 1. 5 and 300K were measured, and no dependence of Fe magnetic moment on carbon concentration was found. The introduction of carbon atoms results in the expansion of unit cell volumes and the rising of Curie temperature. According to the molecular field model,we suggest that the rising of Curie temperature with x is mainly due to the enhancement of Fe-Fe exchange interactions by introduction of interstitial carbon atoms.
WORMHOLE SOLUTION IN THE INDUCED GRAVITY
Authors: XU JIAN-MEI  , LIU LIAO  ,   北京师范大学物理系,北京100875
Published: December 2020

In this paper, we find out that there is the wormhole solution in the vicinity of vacuum of the Higgs field in induced gravity theory even in the absence of other matter fields.
INTERELECTRONIC CORRELATION AND QUALITATIVE FEATURES OF THE FOUR INTRASHELL P STATES OF BORON ATOM
Authors: BAO CHENG-GUANG  ,   中山大学物理系
Published: December 2020

The qualitative features of the four intrashell P states of the boron atom, i.e., the 2Ｐ01 (ground state), 2Ｐ02，2Ｐe1 and 4Ｐe1 states, are investigated. The interelectronic correlation is found to be strongly spindependent. The preferrence of orientation (redative to the total angular momentum) is found to be explicit. The geometric structures of relevant states and the modes of internal motion have been investigated. The decisive effect of quantum mechanical symmetry has been emphasized.
MEASUREMENT OF NONLINEAR REFRACTIVE INDEX WITH Z-SCAN METHOD FOR SLOW DECAY MATERIALS
Authors: YANG QI-GUANG  , FEI HAO-SHENG  , WEI ZHEN-QIAN  ,   吉林大学物理系,长春130023
Published: December 2020

The measurement of nonlinear refractive index with Z-scan method for slow decay materials are discussed in detail. We derive the resultant electric field pattern at the aperture. It is pointed out that the accumulating effect contribute largely to the Z-scan signal in the slow decay nonlinear optical materials. The theoretical analysis is consistent with experimental result.
DIFFERENT INTERDIFFUSION CHARACTERISTICS BETWEEN Ag AND Al/YBa_2Cu_3O_(7-x) CONTACT INTERFACE
Authors: KANG JIN-FENG  , CHEN XIN  , WANG YOU-XIANG  , HAN RU-QI  , XIONG GUANG-CHENG  , LIAN GUI-JUN  , LI JIE  , WU SI-CHENG  ,   (1)北京大学微电子学研究所,北京100871; (2)北京大学物理系,北京100871; (3)中国科学院物理研究所和半导体研究所表面物理国家重点实验室,北京100080
Published: December 2020

Different interdiffusion characteristics between the Ag/YBCO and Al/YBCO contact interfaces have been revealed by SIMS studies. The different electrical properties of Ag/YBCO and Al/YBCO interfaces after high temperature treatment are well understood by SIMS results.
THE DEPENDENCE OF Cs SATURATED ABSORPTION SPECTRA ON THE INTENSITY OF PUMPING LIGHT
Authors: GAN JIAN-HUA  , CHEN XU-ZONG  , LI YI-MIN  , JI WANG-XI  , HUA JING-SHAN  , YAO JI-LIANG  , YANG DONG-HAI  , WANG YI-QIU  ,   北京大学无线电电子学系
Published: December 2020

The dependence of Cs saturated absorption spectra on the intensity of pumping light, especially that of the spectrum of ６２Ｓ１／２Ｆ＝４→６２Ｐ３／２Ｆ′＝５, was measured and calculated. When the pumping light and probing light were linearly polarized, the relative magnitudes of the resonance signals were calculated by solving a set of rate equations with Runge-Kutta algorithm, taking into consideration the optical pumping process and the saturation in the Zee-man sublevels of the hyperfine structure. The theoretical calculations were in good agreement with the experimental results.
SCATTERING-THEORETICAL METHOD FOR THE RECONSTRUCTED β-SiC(100) SURFACE
Authors: GUO QIAO-NENG  , FAN XI-QING  , ZHANG DE-XUAN  , MA BING-XIAN  ,   郑州大学物理工程学院
Published: December 2020

By using scattering-theoretical method, we have calculated the surface-band structure of ideal and （２×１） reconstructed β-SiC(100) surface, and the lay-, atom-and orbital-resolved densities of states. The results show that the major effects of reconstruction occur in the band-gap energy region, and the reconstructed Si and C terminated surfaces are semiconducting. Our calculated surface-band structure are in good agreement with experiments. According to the bonding states and localized state densities of two dimerized atoms, the dimeric symmetry of Si atoms and the dimeric asymmetry of C atoms have qualitatively been explained.
Cu:KNSBN晶体中复色光自泵浦相位共轭猝灭实验及其理论解释
Authors: SHE WEI-LONG  , YU ZHEN-XIN  , LEE WING KEE  ,   (1)香港中文大学物理系; (2)中山大学超快速激光光谱学国家重点实验室
Published: December 2020

When a ５１４.５ｎｍＡｒ＋ laser beam was incident on a Cu-doped ＫＮＳＢＮ crystal, a cat type of self-pumped phase conjugation was observed. And when two collinear ５１４.５ and ４８８ｎｍ beams of Ａｒ＋ laser were incident on the crystal simultaneously, a phenomenon of self-pumped phase conjugation quenching was observed. Both theoretical and experimental results are presented and discussed.
INVESTIGATION OF THE MODE OF GROWTH UNIT FOR HYDROTHERMAL SYNTHESIS OF BARIUM TITANATE CRYSTALLITES
Authors: YUAN RU-LIN  , SHI ER-WEI  , XIA CHANG-TAI  , WANG BU-GUO  , ZHONG WEI-ZHOU  ,   中国科学院上海硅酸盐研究所
Published: December 2020

Nucleation and formation of barium titanate crystallites under hydrothermal conditions was studied using a mathematical model and calculation of the stabilization energy of the growth unit on the basis of synthesis experiments.
STUDY OF CHIRP CHARACTERISTICS OF FEMTOSECOND PULSE PROPAGATION IN CONJUGATED POLYMER
Authors: ZHAO YING-QIAO  , ZHU HE-YUAN  , LIU JIAN-HUA  , SUN-DIE-CHI  , LI FU-MING  ,   复旦大学三束材料改性国家重点联合实验室
Published: December 2020

We study the chirp characteristics of femtosecond laser pulse propagating in conjugated polymer with larger nonlinear dispersion effect by means of theoretical and simulated methods. From the chirp characteristics of femtosecond laser pulse, the explanation for effective spectrum broadening and self-frequency-shift is given.
INVESTIGATION OF A 1D MULTI-SPEED STOCHASTIC MODEL FOR TRAFFIC FLOW WITH INJECTION AND EXTRACTION
Authors: LI HUA-BING  , CENG RUO-HANG  , LIU MU-REN  , KONG LING-JING  ,   广西师范大学物理与电子科学系,桂林 541001
Published: December 2020

We investigate a 1D multi-speed stochastic model for traffic flow with injection and exfraction, and get the analytical results of the dependence of the car probability and traffic flow on the stochas-tic factors when the traffic flow is stationary. Then a 1D cellular automation model is used to simulate the model, the theoretic analytical results agree with the simulation.
NEW SOLITARY WAVE SOLUTIONS FOR A CLASS OF FIFTH-ORDER NOLINEAR EVOLUTION EQUATIONS
Authors: XU BING-ZHEN  , LI YUE-KE  , YAN XUN-LING  ,   山东省聊城师范学院光通信研究所,聊城  252059
Published: December 2020

The exact explicit solitary wave solutions for a class of fifth-order nonliear evolution equations are obtained by using a homogeneous method. Particular important cases of the equation, such as Kaup-Kupershmidt, Caudrey-Dodd-Gibbon-Sawada-Kotera and fifth-order KdV equations can be solved by this method.
LINE-CENTER SHIFT OF MODULATION TRANSFER SPECTROSCOPY DUE TO THE ASYMMETRICITY OF SIDEBANDS
Authors: LUO MING  , BI ZHI-YI  , CHEN YANG-QIN  , MA LONG-SHENG  ,   华东师范大学物理系，量子光学开放实验室，上海  200062
Published: December 2020

Modulation Transfer Spectroscopy (MTS) has been proved to be a very effective method in laser stabilization.The asymmetric sidebands shift the line center of the MTS spectrum,and then re-duce the long term stability and reproducity of laser frequency.In this paper the formula for the line shape of MTS is derived based on the density matrix equations.The formula is applied for the calcu-lation of either the symmetric or asymmetric sidebands.Using this formula,The frequency shift due to the asymmetricity of the sidebands i s estimated.
TO PROBE THE PHASE OF THE ORDER PARAMETER IN HIGH-TEMPERATURE SUPERCONDUCTORS BY USING r.f. SQUID
Authors: DU SHENG-WANG  , DAI YUAN-DONG  , WANG SHI-GUANG  ,   北京大学物理系，人工微结构与介观物理国家重点实验室，北京  100871
Published: December 2020

Based on the theory of r.f. SQUID,the principle for a phase-sensitive test of the symmetry of the order parameter in high-temperature superconductors by using r.f. SQUID in the inductive mode(β≤1,without the limit of β1)is given.We also investigate (calculating and discussing) a system with β=0.7 and offer the range of its r.f. bias flux,under which the r.f. SQUID can be used to probe the phase of the pairing state.
Magnetostriction in (La1-xRx)2/3Sr1/3MnO3 at Room Temperature
Authors: Cao Qing-Qi  , Wu Jian  , Gu Kun-Ming  , Tang Tao  , Zhang Shi-Yuan  , Du You-Wei  ,   南京大学物理系，固体微结构物理国家重点实验室，南京 210093
Published: December 2020

A series of polycrystaline bulk (La1-xRx)2/3Sr1/3MnO3(R=Sm,Tb) over a wide composition range were prepared by two different techniques, and their structure nd magnetostriction effect were studied carefully at room temperature. The X-ray diffraction pattern indicated that the structure of samples transformed from rhombohedral type to orthorhombic phase with decreasing R contents. The sample, composition near the transformation point, had the maximum value of magnetostriction. The magnetostriction may come from the exchange magnetostriction in the samples at room temperature.
SYMMETRIES AND NUMERICAL SOLUTION TO THE MULTIGROUP NEUTRON DIFFUSION EQUATION
Authors: ZHANG SHAO-HONG  , XIE ZHONG-SHENG  ,   西安交通大学核能系，西安  710049
Published: December 2020

The neutron diffusion equation is usually solved in a symmetric region.For a non-rectangular symmetric region,the nonphysical singular problem arises when the c onventional method of deriving nodal solution is employed.In this paper,a new me thod based on both symmetries of the problem and an analytic representation of t he nodal flux distribution is presented.The method is effective for the solution of multigroup diffusion equation in the symmetric region,especially for the non -rectangular problem.It can be applied in 2-D or 3-D problems and its applicatio n in hexagonal geometry is introduced as an example.The only approximations used in deriving the method are the treatment of unknown functions.The efficiency of the proposed method is demonstrated by results of various 2-D and 3-D benchmark problems using the GTDIF-H code.
SUPERLATTICE AND MULTI-QUANTUM-WELL PROPERTIES OF MX COMPOUNDS
Authors: WEI JIAN-HUA  , XIE  SHI-JIE  , MEI  LIANG-MO  ,   山东大学物理系，济南  250100
Published: December 2020

We present a model calculation,using the tight-binding approach,of a one-dimensional heterostructure consisting of regular alternation of two different halogen-bridged transition-metal compounds (MX compounds).Superlattice and multi-quantum-well properties can be detected depending on the well-barrier alternation sequence.We prove the possibility of developing new multi-quantum-well devices based upon MX compounds.
POTENTIONAL ENERGY FUNCTION AND STABILITY OF PuHn+　(n=1,2,3)
Authors: LI QUAN  , LIU XIAO-YA  , WANG HONG-YAN  , ZHU ZHENG HE  , FU YI-BEI  , WANG XIAO-LIN  , SUN YING  ,   (1)四川大学原子与分子物理研究所，成都  610065; (2)四川大学原子与分子物理研究所，成都  610065；四川师范大学化学系，成都  610066; (3)西南核物理与化学研究所，绵阳  621900
Published: December 2020

The theoretical study on PuHn+(n=1,2,3) using density functional meth od(B3LYP) shows that PuH+ and PuH2+ can be stable and PuH3+(7Σ-) cannot be stable. Electronic ground sta tes are X7Σ-(PuH+) and X8Σ-(PuH2+),and their force constants and spectroscopic data have bee n worked out.