bluuebunny/crossref_metadata_2025 huggingface dataset:
CRITICAL CRACKING AND DAMAGE MODE OF TITANIUM NITRIDE FILMS
Authors: LIU CHANG-QING  , JIN ZHU-JING  , LI MEI-SHUAN  , HUHE JI-FU  , WU WEI-TAO  ,   中国科学院金属腐蚀与防护研究所腐蚀科学开放研究实验室,沈阳110015
Published: November 2020

The critical cracking and damage mode of titanium nitride films on pure titanium substrate at ambient temperature were investigated by the Cantilever Bending test. Acoustic Emission technique was employed for identifying the onset of the films fracture which occured with the load increasing when the inner stress of the films σf reached its ultimate strength σc or the shear stress at the interface τf reached the adhesion strength τc. In terms of the above criterions, the initial cracking of the film on the top occured at the inner of films when the load was increased to a critical value, i.e. Lct = 800gf; Whilst the cracking of the film on the bottom started along the interface at the critical load Lcc= 1285 gf. In addition, the feature of the cracking and spalling of the film has been discussed.
EXCITATION ENERGY OF SOLITON IN STRONGLY COUPLED ELECTRON-LATTICE SYSTEM
Authors: FU ROU-LI  , MA YUN-SHENG  , SUN XIN  ,   (1)复旦大学物理系,上海200433; (2)中国科学院红外物理国家重点实验室,上海200083
Published: November 2020

The excitation energy of soliton ε1 and its dependence upon electronlattice coupling: strength λ have been calculated in strongly coupled one dimensional electron-lattice systems. Our results show: The excitation energy of soliton ε1(λ) augments as λ increases. Whereas, ε1, will be always less than the energy needed to excite an electron or a hole in this system.
ANISOTROPIC THERMOELECTRIC POWER OF Bi2Sr2CaCu2O8 SINGLE CRYSTAL
Authors: WANG RUI-PING  , HUANG DA-JIN  , SHI QIN-WEI  , XU PENG  , CHEN QI  , GU GEN-DA  , CAI WEI-LI  , ZHOU GUI-EN  , RUAN YAO-ZHONG  ,   (1)中国科学技术大学材料科学与工程系,合肥230026; (2)中国科学技术大学结构分析开放研究实验室,合肥230026; (3)中国科学技术大学物理系,合肥230026
Published: November 2020

The temperature dependences of the thermoelectric power of a single crystal Bi2Sr2CaCu2O8 were measured in both the a and b directions. We discovered the anisotropy of thermoelectric power in the a-b plane of the crystal. Suggeste that the differences between Sa and Sb are caused by the modulate structure in the b direction. A satisfactory explanation is given by taking into account the contributions of the relatively mobile electrons Sd, the relatively localized electrons Sh and the phonon drag effect Sg.
RETURNING EFFECT AND THE FIRST ZERO FIELD STEP IN AN ANNULAR JOSEPHSON JUNCTION
Authors: WANG QIANG-HUA  , WANG WEI  , YAO XI-XIAN  ,   南京大学物理系,非线性物理中心,南京,210008
Published: November 2020

The returning effect of soliton in an annular Josephson junction is analysed in detail theoretically. Some results are compared with directly numerical simulation ones. To avoid the return effect of soliton, the conditions which relate to the minimum bias current of the first zero step of annular junctions with different geometric and dissipative parameters are discussed. A disscusion of the difference between in-line and annular junction is also made.
MONTE CARLO SIMULATION OF THE THREE-STATE VECTOR POTTS MODEL ON A THREE-DIMENSIONAL RANDOM LATTICE
Authors: JI DA-REN  , ZHANG JIAN-BO  , YING HE-PING  ,   浙江近代物理中心,浙江大学物理系,杭州310027
Published: November 2020

We have performed a numerical simulation of the three-state vector Potts model on a three-dimensional random lattice. The averages of energy density, magnetization, specific heat and suscetibility of the system in the N× N× N (N = 8, 10, 12) lattices were calculated. These results show that this spin system exhibits an energetie thermal hyoteresis diagram and a sharp peak of specific, which could show that the system experierces phase transition with 1st ordes Z(3) symmetry breaking, this conclusion is supported by the law of the jump of magnetization. These results obtained on the random lattice were consistent with those obtained on the three-dimensional cubic lattices.
LEAD FREE SINGLE CRYSTALS OF INDIUM SUBSTITUTED BCVIG AND THEIR MAGNETO-OPTICAL PROPERTIES
Authors: LIU YU-LONG  , ZHANG PENG-XIANG  , LI SHUN-FANG  , A. PAOLETTI  , P. PAROLI  , A. TUCCIARONE  ,   (1)意大利国家研究中心固体电子学研究所; (2)中国科学院物理研究所,北京100080
Published: November 2020

Lead free single crystals of the ferrimagnetic garnet Bi3-2xCa2xFe5-x-yInyVxO12 are grown by using the flux method. High quality single crystals having a dimension greater than 10 mm and few inclusions can be obtained for all materials with different In content by the technology described in this paper. Faraday rotation and optical absorption of a single crystal with x≈ 0.90, y ≈ 0.12 were measured for wavelength in the range of 0.70 to 2.2 ≈m. In spite of the remarkable increase of rotation by the bismuth substitution, no appreciable increase of absorption coefficient is observed in this wavelength region. Our results demonstrated lead free single crystals of In-BCVIG synthesized in x≈ 1.0 composition region with small amount of In substitution are a magneto-optical material with hige value of magneto-optical figure of merit. Considering its low and variable magnetization, high Curie temprature and rather large magneto-optical rotation, the above results show that the crystals can be employed in magneto-optical devices.
InP EFFECTS ON CuPc LB FILM AND THE PHASE CHANGE
Authors: KONG XIANG-GUI  , LI MEI  , Lü AN-DE  , JIN ZHOU-ZE  , E SHU-LIN  ,   中国科学院长春物理研究所,长春130021
Published: November 2020

Interaction between the rough surface of InP and LB thin film of CuPc have been studied, and the reversible structure phase transition are found at room temperature and liquid nitrogen temperature, respectively.
SYMMETRY REDUCTIONS OF WHITHAM-BROER-KAUP EQUATIONS IN SHALLOW WATER
Authors: RUAN HANG-YU  , LOU SEN-YUE  ,   宁波师范学院现代物理研究室,宁波315211
Published: November 2020

In this paper, five types of similarity reductions of Whitham-Broer-kaup equations in shallow water are given by both the classical Lie approach and the direct method. The Painlevé Ⅱ type reduction equation obtained by the classical Lie approach is only the special case of that obtained by the direct method. In the similarity reduction results of the direct method, three types of singularity points, i.e., poles, algebraic branch points and logarithmic branch points. are included.
GENERATION OF SQUEEZED LIGHT IN IDEAL CAVITY BY INJECTING ATOMS
Authors: CAO CHANG-QI  , DING XIAO-HONG  ,   北京大学物理系,北京100871
Published: November 2020

Two level atoms are injected into ideal cavity one by one to interact with the light field therein which intially is in coherent state. In one-photon transition case, the quadrature variance could be reduced by this means for suitably chosen interaction time t. But there exists some limitation, the squeezing will become worse if the number of times K is too large. In twophoton transition case, for large mean photon tumber N and optimum interaction time t = π/ g2, analytical formula for dependence of quadrature variance on N and K can be obtained. This formula shows that deep squeezing can be achieved by suitably chosen K. And the larger the N is, the stronger the achievable squeezing will be.
EFFECT OF SUBSTRATE TEMPERATURE ON ZnSe FILMS GROWN BY HOT WALL EPITAXY
Authors: Lü HONG-QIANG  , WANG JIE  , SHEN JUN  , LIU YONG  , WANG XUN  , WANG CHANG-PING  , WANG JIAN-BAO  , LI CHEN  , SHEN XIAO-LIANG  ,   (1)复旦大学分析测试中心,上海200433; (2)复旦大学物理系,上海200433; (3)复旦大学应用表面物理国家重点实验室,上海200433
Published: November 2020

In this paper, we report the results of the growth of a series of ZnSe films on (100) GaAs at different substrate temperatures by hot wall epitaxy. The quality of ZnSe films has been studied by X-ray diffraction, Raman scattering and photoluminescence. The results show that: 1) We have got (100)-oriented single crystal fillms, but the quality becomes worse when lowering the substrate temperature. When the substrate temperature is below 300℃ there appears the (111)-oriented twins in the (100ZnSe. 2) When the substrate temperature is 350℃, Ga atom diffusion from the substrate to the ZnSe epitaxial layer is serious.
INVESTIGATION ON VARIETIES OF EFFECTS AND VARIAT-ION OF ENERGY AS SIZE AND SHAPE OF THE NONLOCAL HOLE VARIES WITH ELECTRIC DENSITY
Authors: LI FU-BIN  ,   中国矿业大学数力系,徐州221008;中国高等科学技术中心(世界实验室),北京100080
Published: November 2020

The electron self-interaction present in local-density theory can be removed by assuming a nonlocal hole in the electron density to generate the exchange-correlation energy. The potential derived from this energy has two contributions: the electrostatic potential from the hole and terms which describe the variation of the energy as the size and shape of the hole varies with density. All previous authors have included the first contribution, but the treatment of the second ranges from neglect to including them exactly. This work examines the effect of including these terms exactly, approximating them locally or neglecting them completely. Complete neglect yields severely distorted wave functions. This work shows how these terms may be generally estimated locally, which is much simpler than treating them exactly.
ELASTIC SCATTERING OF SPIN ELECTRON BY Xe ATOM
Authors: HOU QING  , LI JIA-MING  ,   (1)中国科学院物理研究所,北京100080; (2)中国科学院物理研究所,北京100080;四川大学720研究所,成都610064
Published: November 2020

In the processes of electron elastic scartering from spinless atoms, the incident electrons are treated as moving relativistically in an effective central potential V(r). The potential is calculated by relativistic self-consistent-field method with Slater local exchange approximations (i.e. Dirac-Slater SCF). Elastic scattering amplitudes are calculated by relativistic partial-wave expansion method. Then we calculated the differential cross section for electron elastic scattering from Xe atom and the spin polarization parameters. Detail comparisons of the theoretical and complete experimental results show the validity of the theoretical method adopted.
EQUILIBRIUM AND NONEQUILIBRIUM CORRELATIONS FUNCTIONS OF A FLUID SOLVED BY CELLULAR AUTOMATA APPROACH SIMULATIONS
Authors: LI FU-BIN  ,   中国矿业大学数力学,徐州221008;中国高等科学技术中心(世界实验室),北京100080
Published: November 2020

The spatial correlation functions in a fluid subjected to an external temperature gradient have been computed by using cellular automata simulations of a simple lattice-gas model with temperature. We obtain numerical results and show a quite good qualitative agreement with the predictions of the fluctuating hydrodynamics.
A STUDY ON CHARACTERISTICS OF THE VACANCY COMPLEX IN Fe-V-N DILUTE ALLOY (II)
Authors: WANG XIAO-GANG  , ZHANG HONG  ,   (1)中国科学院上海冶金研究所,上海200050; (2)中国科学院上海冶金研究所,上海200050;湖南师范大学物理系,长沙410006
Published: November 2020

The discrete variational method, cluster model and a fully-three dimensional numerical relaxation technique are used to study the atomic configuration, positron annihilation characteristics and electronic structure of the V-N-vacancy complex in the dilute Fe-V-N alloy. Optimum location of nitrogen and vanadium in the V-N-vacancy complex is determined, according to the result of the positron annihilation lifetime experiment and minimizing the total energy. The bond characteristics and charge transfer in the V-N-vacancy complex are analyzed.
A SUPERCELL CALCULATION OF ELECTRONIC STRUCTURE IN SUPERCONDUCTOR Ba1-xKxBiO3 (x=0.25, 0.5 and 0.75)
Authors: SHEN YAO-WEN  , HUANG MEI-CHUN  ,   厦门大学物理系,厦门361005
Published: November 2020

Electronic structure for ordered Ba1-xKx)BiO3 alloys has been calculated with a supercell LMTO method. The results indicate that the band parameters obtained from this approach are more accurate than that from rigid-band approximation. The composition dependence of the band parameters at Fermi surface is given. The hybrid feature of the valence orbitals between the inequivalent oxygen and metal atoms is discussed.
SUPERCONDUCTIVITY AND MAGNETIC PROPERTIES OF Pr0.2Yb0.8-xLaxBa2Cu3O7-δ
Authors: CHEN XIAO-LONG  , LIANG JING-KUI  , XIE SI-SHEN  , QIAO ZHI-YU  , TONG XIAO-SHU  , XING XIAN-RAN  ,   (1)北京科技大学,北京100083; (2)中国高等科学技术中心(世界实验室),北京100080; (3)中国科学院物理研究所,北京100080
Published: November 2020

The crystal structure, superconducting and magnetic properties of Pr0.2Yb0.8-xLaxBa2Cu3O7-δ have been investigated. The res ults show that with the concentration of Pr being constant, the critical transition temperature Tc of this syster decreases with the increasing of La concetration and Tc is quenched at x = 0.6. The coefficient of electron specific heat and the density of states N(0) inferred from magnetic measurements also decrease with x. The relation between the effective radii of rare earth elements and hybridization is discussed in brief.
AN ASYMPTOTIC ANALYSIS OF THE TRAVELLING WAVE SOLUTION OF THE KdV BURGERS EQUATION
Authors: Lü XIAN-QING  ,   山东教育学院数理系,济南,250013
Published: November 2020

By applying the theory and method of singular perturbations, we investigate the travelling wave solution of the KdVB equation under the assumption v2?4μ. We get the explicit expression of the travelling wave solution up to the third order atfirst. Then, we obtain the general asymptotic expansion: u=u(0)+εu(1)+ε1u(2)+…+εnu(n)+… and prove that u(j)(j=1,2,…,n,…) are bounded functions.
CLOSE COUPLING WAVE PACKET THEORY OF ATOM- DIATOM SCATTERING
Authors: REN TING-QI  , YANG HUAN-WANG  , ZHANG YI-CI  ,   (1)山东师范大学物理系,济南,250014; (2)烟台师范学院物理系,烟台,264000
Published: November 2020

In the space-fixed(SF)coordinate frame and body-fixed(BF) coordinate frame, we cal-culete the state to state transitional probabilities for the He-H2 system by using the rencently developed close coupling wave packet method. The results shows that (1) the two theories formulated in the SF frame and BF frame are equivalent, and the calculated results of the two method coincide with that of close coupling method, (2) the calculational efficience in the SF, frame is higher than that in the BF frame as the number of coupled terms increases.
CONSERVATION LAWS OF THE VARIABLE COEFFICIENT KdV AND MKdV EQUATIONS
Authors: LOU SEN-YUE  , RUAN HANG-YU  ,   宁波师范学院现代物理研究室,宁波,315211
Published: November 2020

In this paper, by using the Miura's method, we study the infinite conservation laws of the variable coefficient KdV and MKdV equations with three arbitrary functions of t. The result points out that the conserved densities which have the structures completely similar to the con-stat coefficient KdV and MKdV equations depend only on one arbitrary function. The other two arbitrary functions are contained only in the corresponding fluxes.
PEIERLS MECHANISM OF HYDROGEN CHAIN (Ⅰ)——THE DIMERIZATION OF THE HARTREE-FOCK SOLUTIONS
Authors: FU RONG-TANG  , SUN XIN  ,   (1)复旦大学物理系,上海,200433;中国科学技术大学结构分析开放研究实验室,合肥,230026; (2)复旦大学物理系,上海,200433;中国科学院上海技术物理研究所红外物理国家实验室,上海,200083
Published: November 2020

Ab initio study has been used to explore the problem if the Peierls instability in hydrogen chain presents or not. With a Gaussian-type-orbital basis set and periodicity of hydrogen chain, we construct a complete set of orthogonal and normalized wave functions in view of the second-neighbor approximation. Starting from the restricted Hartree-Fock scheme, we diagnoalize the Fock matrix analytically and calculate the LCAO-MO-SCF solutions. The dependence of the total energy on dimerization is analyzed, it is shown that the ground state of metal hydrogen chain is unstable, and that obvious dimerization may occur in infinite hydrogen chain. The Per erls instability presents in this system nevertheless.
PEIERLS MECHANISM OF HYDROGEN CHAIN (Ⅱ)——THE DEPENDENCE OF THE PEIERLS INSTABILITY ON THE ELECTRON CORRELATION
Authors: FU RONG-TANG  , SUN XIN  ,   (1)复旦大学物理系,上海,200433;中国科学技术大学结构分析开放研究实验室,合肥,230026; (2)复旦大学物理系,上海,200433;中国科学院上海技术物理研究所红外物理国家实验室,上海,200083
Published: November 2020

We use the correlated basis functions method to explore the problem of the Pe-ierls instability due to the electron correlation in hydrogen chain. Our thory shows that the bond alternation is reduced from 0.37 (au) to 0.32 (au) by the electron correlation, but the Peierls instability survives under the electron-electron interaction.
EFFECT OF RELATIVISTIC HYSTERESIS ON RESONANCE ABSORPTION
Authors: MA JIN-XIU  , SHENG ZHENG-MING  , XU ZHI-ZHAN  ,   中国科学院上海光学精密机械研究所,上海,201800
Published: November 2020

Using a simple model, it is shown that because of the relativistic electron-mass variation, the mode-converted electrostatic electric field exhibits hysteresis in the vicinity of critical layer. This hysteretic effect is to increase the resonance absorption of obliquely incident p-pola-rized light in a way by increasing the large amplitude region of the electrostatic field. When the threshold light intensity for the occurance of hysteresis is exceeded, the fractional absorption increases drastically above the linear results.
RESONANCE FLUORESCENCE SPECTRUM OF TWO-LEVEL ATOM IN CONSIDERATION OF SELF-REACTION
Authors: LIU REN-HONG  , TAN WEI-HAN  ,   中国科学院上海光学精密机械研究所,上海,201800
Published: November 2020

In this paper, the resonance fluorescence spectrum of two level atom is investigated under the influence of both the driving field and the emission field from the atom itself. Some new features are revealed. The most important one the disappearence of the central peak resulting from the vacuum Rabi splitting, and the presence of the new central peak resulting from the interaction between side peak and self emission at the same time.
THEORY OF DEGENERATE AND NEARLY DEGENERATE FOUR-WAVE MIXING IN PLASMAS——IN THE CASE OF REFLECTION GRATING CONFIGURATION
Authors: WU YING  , YANG XIAO-XUE  ,   华中理工大学物理系,武汉,430074
Published: November 2020

In this paper, the theory of degenerate and nearly degenerate four wave mixing in plasmas in reflection geometry is investigate. The universal set of four wave nonlinear coupled equations is obtained and its exact solution appropriate for arbitrary nonlinear coupling parameter is found.
BEHAVIOUR OF X-RAY DIFFRACTION FROM UNIFORMLY BENT Si CRYSTAL
Authors: YANG PING  ,   南京大学固体微结构物理国家实验室,南京,210008
Published: November 2020

X-ray diffraction from uniformly bent Si crystal has been studied. The experimental integrated diffraction intensity rises monotonically with the strain in the crystal, this coincides with the theory. The visibility of Pendell?sung fringes becomes poorer as the strain goes up, this reflects the increse of intensity difference between the wave fields and variation of the trace of the wave fields in the crystal.
STUDY ON DISLOCATIONS IN LITHIUM BORIC OXIDE (LBO) CRYSTAL
Authors: ZHAO QING-LAN  , HUANG YI-SEN  , TANG DING-YUAN  ,   中国科学院福建物质结构研究所,福州,350002
Published: November 2020

Dislocations in a new non-linear crystal, Lithium Boric Oxide(LBO), have been observed and identified by X-ray diffraction topography. The structural factor which plays important role on dislocations formation, the lattice expansion and twinned growth is given.
FORMATION OF HOLOGRAPHIC DIFFRACTION GRATINGS ON THE SURFACE OF A n-TYPE Ga As AND MEASURING OF LIGHT EMISSION BY SURFACE PLASMON POLARITON
Authors: WU DlNG-XIANG  ,   上海科学技术大学物理系,上海,201800
Published: November 2020

The method to produce diffraction gratings by H2O2-H2SO4 photo-accelerated etching on the surface of n-GaAs and measuring of light emission by surface pla smon polariton from an Ag/n-GaAs Schottky barrier diode are discussed in this paper.
STRONG CHEMISORPTION AND DISSOCIATION OF N2 ON Cr(110) SURFACES
Authors: ZHOU RU-HONG  , CAO PEI-LIN  ,   浙江大学物理系,杭州,310027
Published: November 2020

An ASED-MO method has been applied to investigate the N2 chemisorption on Cr(110) surface. The results show that N2 chemisorbs parallelly on the 4-fold site with N-N axis parallel to [110] direction. Different from the tranditional σ-donation and π weak backbonding concepts, the N2 chemisorption on Cr(110) has both the 3 σg and 1 πμ donations of 0.97 and 0.54 electrons. At the same time, the backbonding to the 1 πg orbital increases to 1.83 electrons. Both these factors make the lying-down orientation being favored over the upright orientation. Furthermore, the N-N bond length strenches 17%, the N-N bond order decreases to below 1, and the dissociation barrier is only about 0.15 eV. All the above calculation results are in good agreement with relevant experiments.
INVESTIGATION ON THERMAL STABILITY OF REACTIVE- SPUTTERING a-Si:H/a-Ge:H SUPERLATTICES
Authors: WANG YIN-YUE  , XU HUAI-ZHE  , CHEN GUANG-HUA  ,   兰州大学物理系,兰州,730000
Published: November 2020

The thermal stability of a-Si:H/a-Ge:H superlattices was studied using LR and XRD spec tra. It was found that the crystallization temperature of superlattices with small layer thickness is higher than that of bulk a-Ge:H. Results are discussed preliminarily.
EFFECT OF ROUGHNESS OF MULTILAYER INTERFACE ON THE DOUBLE-CRYSTAL X-RAY DIFFRACTION ROCKING CURVES
Authors: OUYANG JI-TING  , MAI ZHEN-HONG  , CUI SHU-FAN  ,   中国科学院物理研究所,北京,100080
Published: November 2020

Based on X-ray dynamical theory, the double-crystal diffraction rocking curves for In-GaAs/InP single layer and InGaAs/AlInAs/InP superlattice were calculated for both perfect and rough interfaces. It is shown that the effect of roughness of multilayer interface on the zero-order diffraction peak was not obvious but severe on both the satellite peaks for superlattice and the interference fringes for single layer structure. With the increasing of the interface roughness, the intensities of interference fringes were reduced and disappeared. And for the satellite peaks, their intensities were reduced and the full width at half maximum broadened. Comparing the experimental result with the calculated one, we believe that there still exists an average roughness of about one monoatomic layer at the interface of high quality InGaAs/Al-InAs/InP lattice-match superlattice sample.
OPTICAL DIODE EFFECT INDUCED BY USING TWO LASER BEAMS IN Mn DOPED KNSBN CRYSTAL
Authors: SHE WEI-LONG  , LI QING-XING  , YU ZHEN-XIN  , GAO ZHAO-LAN  , ZHANG QING-LUN  , CHEN HUAN-CHU  ,   (1)山东大学晶体材料研究所,济南,250100; (2)中山大学激光与光谱学研究所,广州,510275
Published: November 2020

Two laser beams of wave length 632.8nm encouter in Mn doped KNSBN crystal and induce a optical diode. A maximum ratio of 202 for equivalent transmissivity in two directions of the optical diode is obtained at the input powers of 0.876mW and 0.0914mW respectivly and the ratio shows a tendency to increase further.
STUDIES ON MAGNETIC PROPERTIES OF FILM OF POLYANILINE
Authors: WAN MEI-XIANG  , ZHOU WEI-XIA  ,   中国科学院化学研究所,北京,100080
Published: November 2020

The ESR single and magnetic properties of free standing film of polyaniline (PANI) have been measured as a function of elongation treatment and the protonation state. The results obtained are compared with its powder. The magnetic properties of free standing film of PANI is similar to its powder, and it varies with transition of insulator to metal after protonation. For elongated free standing film of PANI, on the other hand,both Pauli and Curie spin are higher than that of its powder and the free standing film this may be due to increasing of interaction between uncoupled electrons on quinoid ring at PANI chain.
MULTIPHTON SPECTROSCOPY OF RYDBERG AND MIXED RYDBERG VALENCE STATES OF Cl2
Authors: FU GUANG-SHENG  , E. HONTZOPOULOS  , C. FOTAKIS  ,   (1)Foundation for Research and Technology-Hellas-lnstitute of Electronic Structure and Laser,71110 Heraklion,Crete,Greece; (2)河北大学物理系,保定,071002
Published: November 2020

The structures and properties of highly excited Rydberg and mixed Rydberg-valence states of molecular chlorine have been studied in detail by combining ioniza-tion, excitation and fluorescence spectroscopic techniques following multiphoton exci tation. The position of the inner-well of 11∑u+ state is located, and the 21∑u+ state is found to exhibit a strong mixed Rydberg and ion-pair valence character. A new series with symmetry is discovered and a assignment to the excitation of Rydberg state 3∑u is suggested. Based on the experimental results, the processes of three photon excitation, interation of 21∑u+ with 11∑u+ states and spectral effects of third harmonic generation are discussed.
INSTANTANEOUS RESONANCE FLUORESCENCE SPECTRUM OF A TWO LEVEL ATOMIC SYSTEM DRIVEN BY AN EXPONENTIAL BY DCEAYING FIELD
Authors: TAN WEI-SI  , TAN WEI-HAN  , ZHAO DONG-SHENG  , LIU REN-HONG  ,   中国科学院上海光学精密机械研究所,量子光学开放研究实验室,上海,201800
Published: November 2020

The commutation relation and quantum mechanical Langevin equations for a two-levef system is evaluated at first. Then, the instantaneous fluorescence spectrum of atomic system driven by an exponentially decaying field is calculated.
HIGHER ORDER SQUEEZING OF MIXED SUPERPOSITION STATES
Authors: DONG CHUAN-HUA  ,   上海工业大学基础课教育部,上海,200072
Published: November 2020

In this paper, we calculate the k-th moments of △a1 and △a2 in mixed superposition states, discuss the higher-order squeezing in these states with Bloch vector. We also describe and calculate squeeze zones, and squeeze conditions in higher-order squeezing, discuss some optimum squeeze conditions. We conclude that two quadrature components a1 and a1 can be squeezed to higher-order at the same time under some conditions. Finally, we try to discuss the nature of squeeze in superposition states.
INVESTIGATION ON ELECTRICAL PROPERTIES AND ESR OF AMORPHOUS Li+ CONDUCTOR B2O3-0.7Li2O-0.7LiCl-xAl2O3-0.1V2O5
Authors: SU FANG  , SU JUN  , JIN SI-ZHAO  ,   (1)中国科学技术大学基础物理中心,合肥,230026; (2)中国科学技术大学结构分析开放研究实验室,合肥,230026; (3)中国科学技术大学物理系,合肥,230026
Published: November 2020

Two kinds of amorphous Li+ conductor, B2O3-0.7Li2O-0.7LiCl-xAl2O3-0.1V2O5(x= 0.05 and 0.15), were studied with differential thermal analysis, conductivity measurement, X-ray diffraction and ESR spectroscopy. We find that: (1)V2O5 not only is amorphous network former, but also changes the process of crystallization;(2) For both the B2O3-Li2O-LiCl-Al2O3-V2O5 glasses and the P2O5-Li2O-LiCl-Al2O3 glasses,ionic conductivity of the tablet sample is 26 times higher than that of 60 mesh powder sample of the same material; the whole piece of glass has an obviously lower activation energy and a conductivity that is two orders higher than that of the tablet sample, so it is more suitable for ion transport; (3) Adding V2O5 less than 3.9mol% to amorphous Li+ conductor B2O3-0.7Li2O-0.7LiCl-xAl2O3(0≤x≤0.15) does not cause electron-conductivity to increase rapidly. Further more, this makes it possible to apply the technique of ESR to study the micro structure of and electron movement in the material.
ADSORPTION OF CO ON Cu{001}c(2×2)-Pd ORDERED SURFACE ALLOY
Authors: Lü SI-HUA  , LIU GUO-LIANG  , YAO JUN LIU  , FENG-QIN  , WU SI-CHENG  ,   (1)北京大学物理系,北京,100871; (2)烟台大学物理系,烟台,264005; (3)中国科学院高能物理研究所,北京,100039
Published: November 2020

The site of CO adsorbed on Cu {00l}c(2×2)-Pd ordered surface alloy has been studies using high resolution electron energy loss spectroscopy (HREELS). CO molecules are bonded vertically only on top sites of Pd atoms at 240K. At 135K, CO molecules are bonded vertically on top position of Pd atoms also under low coverage, and CO adsorbed both on top site of Pd and Cu atoms under high coverage.
MS-Xα CALCULATIONS OF CHROMIUM ION IN DIFFERENT VALENCE STATES WITH SIX LIGANDS
Authors: ZHU SHENG-XIANG  , YANG BAO-CHENG  , LIN YUAN-GI  , SHEN ZHONG-JUN  , ZHENG YI-SHAN  , ZHU JI-KANG  ,   (1)华东师范大学物理系,上海,200062; (2)上海软件开发中心,上海,200031; (3)同济大学测试中心,上海,200092
Published: November 2020

In this paper, the electronic structures of the complex ions (CrO6) in three different valence states of chromium ion (Cr2+, Cr3+, Cr4+) are calculated with the spin-polarized MS-Xaaaa method. The one-electron eignvalues and eignfunctions, the energy levels, and the optical transitions under the D4k symetry are given. The calculated results are discussed comprehensively.
ELECTRON CORRELATION IN ONE-DIMENSIONAL CONDUCTING POLYMERS (11111111) NEUTRAL SOLITON
Authors: HU WEI-JUN  , MEI LIANG-MO  , SUN XIN  ,   (1)复旦大学物理系,上海,200433; (2)山东大学物理系,济南,250100; (3)山东大学物理系,济南,250100;济南军区军医学校计算中心,济南,250022
Published: November 2020

In this paper, electron-electron correlation in one-dimensional conducting polyers is studied in detail. A new idea, i.e., that of "over-average interaction amoug eltctrons", is introduced. By considering the nearest-neighbor interactions, and on-sitt, site-site, site-bond, and on-bond terms a model Hamilitonian is proposed. The calculated numerical results are in good agreement with that of the optical absorption experiments and the ENDOR experiments on the neutral soliton in trans-(CH)x.
X-RAY IRRADIATION EFFECT IN a-Si SOLAR CELL AND ITS BELOW-GAP PHOTOCURRENT SPECTROSCOPY OBSERVATION
Authors: WEI GUANG-PU  ,   上海科学技术大学材料科学系,上海,201800
Published: November 2020

X-ray irradiation effect in hydrogenated amorphous silicon (a-Si:H or a-Si) solar cell has been observed. The results show that the photovoltaic characteristics decrease with the increasing of X-ray irradiation dose at first, and then tend to a steady state. By the below-gap photocurrent spectroscopy measurement, the change of defect density in a-Si induced by X-ray irradiation was studied. The results show that the defect density increase with the X-ray irradiation dose.
A STUDY ON PROPERTIES OF Au-DOPED SILICON
Authors: CHEN MIN-RUI  , SHEN YI-HUI  , LIU SHI-YI  ,   厦门大学物理系,厦门,361005
Published: November 2020

In this paper infra-red absorption spectra and surface photovoltaic spectra of An-doped and undoped silicon are studied. The relation of minority carrier diffusion length to the height of base line of infra-red absorption spectra under the same surface condition is determined. By using semiconductor statistics, we obtain the Au-doped silicon semicondutor statistics formulae when the degeneracy factor is different from unit, as well as silicon two-levels recombination theory formulae when gAu,a≠1 and gAn,d≠ 1 The ratios of the ca-culated lifetime of minority carrier to the experimental data are between 1.64 and 0.745.
A STUDY ON PHOTOLUMINESCENCE IN a-C:H FILMS
Authors: CHEN GUANG-HUA  , YAN SHAO-GUANG  , ZHANG FANG-QING  ,   兰州大学物理系,兰州,730001
Published: November 2020

In this paper, the changes of photoluminescence (PL) spectra according to varied measuring temperatures, annealing temperatures, and excition wavelength in a-C:H films deposited by rf glow discharge are studied. The experimental results show that the PL efficiency becomes lower with increasing the measuring temperature or annealing temperature. We give an explanation to the phenomena using the two-phase model in a-C:H system. Furthermore, the PL spectra also changes with excitation energy; and as the latter geis near the optical gap Eopt, the emission intensity reaches its maximum.
ARUPS STUDY OF THE COADSORPTION OF CO AND K ON Cu(111)
Authors: BAO SHI-NING  , XU RONG  , LI HAI-YANG  , ZHU LI  , XU CHUN-YI  , XU YA-BO  ,   浙江大学物理系,杭州,310027
Published: November 2020

The results of an angle resolved UPS study on K-CO coadsorbate on Cu(111) show that there is a molecular adsorption state of CO on the Cu(lll) with potassium at room temperature. The low 4σ/(5σ + 1π) intensity ratio suggests that the CO molecules inclined strongly in this state. Two adsorption states of CO are found at low temperatures (～150K). One of them appears for higher CO exposure (≥1L) only, and the other which exists for all (tcposures is similar to that at room temperature.
STATISTICAL ANGLE OF QUANTUM MIXED STATES
Authors: ZHU DONG-PEI  , WANG REN-CHUAN  , WANG GUI-XING  ,   (1)中国科学技术大学近代物理系,合肥,230026; (2)中国科学技术大学天体物理中心
Published: November 2020

The statistical angle between quantum pure stages has been generalized to quantum mixed states. For the case of a single mixed state, it leads to a concept of divergence angle. A criterion for pure state is obtained. In the quantum measurement the information function is the squared cosine of statistical angle between the quantum system and the instrument. The entropy increase during the measurement process appears to be the expanding of the divergence angle.
ON THE SATURATION PROPERTIES AND THE LIQUID-GAS TRANSITION OF FINITE NUCLEAR MATTER
Authors: WANG NENG-PING  , YANG SHAN-DE  ,   吉林大学物理系,长春,130023
Published: November 2020

The saturation properties and the liquid-gas transition of finite nuclear matter are investigated with the Skyrme effective interaction and the Coulomb interaction in the framework of Hartree-Fock theory. The critical temperature for liquid-gas transition of finite nuclear matter is found to be around 12 MeV.
OPTICAL RESONANCE METHOD FOR MEASURING ION ENERGY
Authors: SHI WEI  , LU FU-QUAN  , WU SONG-MAO  , TANG JIA-YONG  , YANG FU-JIA  ,   复旦大学原子核科学系,上海,200433
Published: November 2020

An optical resonance method for measuring ion energy has been suggested. The experimental details are described. The method relates the resonant oprical transition of ions and the ion energy through the Doppler effect. The method can be applied in the energy range of leV-100 MeV, and its accuracy is expreted to reach 5×10-5 near energy of 30 keV. We have measured the 142Nd+-ion energy by this method and the result is fairly good.
MEASUREMENTS OF BEAM OPTICAL CHARACTERISTICS OF NEON-LIKE GERMANIUM X-RAY LASER
Authors: HE SHAO-TANO  , HE AN  , CHUNYU SHUTAI  , ZHANG QI-PEN  , GU YUAN-YUAN  , NI YUAN-LONG  , YU SONG-YU  , ZHOU ZHENG-LIANG  ,   (1)西南核物理与化学研究所,成都,610003; (2)中国科学院上海光学精密机械研究所高功率激光物理开放研究实验室,上海,201800
Published: November 2020

The spatial profiles in the horizontal and vertical direction of lasing line intensity of neon-like germanium were measured. For a 20mm long plasma of 102μm lateral dimension, the main beam in the horizontal direction is found to exhibit an angular divergence of 12 mrad with a offset displaced 8 mrad from the plasma axis and the beam angular divergence in vertical direction is about 22 mrad. In addition, the characteristic of beam optics of the double-pass amplification was diagnosted using a Mo/Si multilayer mirror.
THE ATOM SQUEEZING EFFECT FOR OFF-RESONANT TWO-PHOTON OPTICAL BISTABILITY IN BAD-CAVITY CASE
Authors: S. SACHUIF  , HU GANG  ,   北京师范大学物理系,北京,100875
Published: November 2020

The atom squeezing effect for off-resonant two-photon optical bistability in bad-cavity limit is studied by means of Fokker-Planck equation of the generalized Wigner distribution. The distribution of the squeezing region in Δ-θ plane is described. As atom-detuning is sufficiently large, the squeezing effect of the atom operator R2 may appear.
THE INFLUENCE OF THE DEVIATION ANGLE ON THE ROCKING CURVE AND ITS WIDETH
Authors: LI CHAO-RONG  , MAI ZHEN-HONG  , CUI SHU-FAN  ,   中国科学院物理研究所,北京,100080
Published: November 2020

The influence of the deviation angle of the sample surface from the exact crystalline surface on the X-ray double crystal rocking curves an{d its full width at half maximum (FWHM) were investigated based on the X-ray dynamical diffraction theory. The results show that when the sample surface has a deviation from the exact crystalline surface, the profile of rocking curves and their FWHMs are dependent on the incident angle and the direction of X-ray beam. Moreover, with the decreasing of the incident angle, the FWHM of rocking curve increases, and the reflection peaks shift to the high angle region. This influence becomes more significant when the asymmetrical diffraction is used.
PHASE TRANSITION OF COMB POLYMER NEMATIC LIQUID CRYSTAL
Authors: LIU HONG  ,   南京师范大学物理系,南京,210024
Published: November 2020

The Hamiltonian of comb polymer nematic liquid crystal molecule is constructed by using the interaction model of nematic liquid crystal molecule proposed by Freiser and the mean field theory. The self-consistancy equations of order parameters are derived and the phase transitions from isotropics to uniaxial nematics, uniaxial to biaxial nematics are obtained. The results show that when the repulsion in coupling term of backbone and side chain getting greater, the nematic field of the stronger one between those of backbone and side chain getting stronger, the uniaxial-biaxial phase transition temperature will rise and the phase transition will gradually change from first order to second order phase transition.
A MASS TRANSFER MODEL FOR THE PLASMA DEPOSITION PROCESS IN AXIAL-FLOW REACTOR
Authors: LIU ZU-LI  , ZHU DA-QI  , SONG WEN-DONG  , CHEN JUN-FANG  ,   华中理工大学物埋系,武汉,430074
Published: November 2020

A kinetic model for the glow discharge plasma deposition process in the axial-flow reactor is proposed. In particular, the realtionships between the deposition characteristics (i.e., generation rate, generation frequency, deposition rate, and gas efficiency) and the process parameters (gas flow rate and gas pressure) are examined by numerical modeling technique. Some results has been explained.
EXTENDED ONE-DIMENSIONAL FIBONACCI STRUCTURES
Authors: HU AN  , JIANG SHU-SHENG  , PENG RU-WEN  , ZHANG CHUN-SHENG  , FENG DUAN  ,   南京大学固体微结构物理国家实验室,南京,210008
Published: November 2020

A one-dimensional k-component Fibonacci structure, which includes k incommensurate intervals, is the natural extension of the Fibonacci structure with two intervals. The projection method is applied to deal with the pattern and indexing problems of X-ray diffraction. The theoretical simulation is performed to prove the projection method for this extended Fibonacci structures. The diffraction spectrum will lead to chaos for a finite chain provided that k is sufficiently large.
X-RAY PHOTOELECTRON SPECTROSCOPY STUDY ON THE ELECTRONIC STATE OF Gd-DOPED 2212 SINGLE CRYSTAL IN Bi-BASED SYSTEM
Authors: WANG NAN-LIN  , SHA JIAN  , ZHANG QI-RUI  , WANG XI-QING  , QIAN YI-TAI  , CHEN ZU-YAO  ,   (1)浙江大学物理系,杭州,310027; (2)中国科学技术大学物理系结构分析开放研究实验室,合肥,230026; (3)中国科学技术大学应用化学系,合肥,230026
Published: November 2020

XPS measurements have been carried out to study the difference in the electronic state between the pure 2212 single crystal and the Gd-doped 2212 single crystal in Bi-based system. Experimental results show that the suppression of superconductivity by Gd doping is caused by the hole filling in the O2p orbital. The problems, such as that about the ratio of the intensity of the satellite peaks to that of main peak (Is/Im) the physical property of Bi-O layer and the contribution to the density of state (DOS) at Er for the Bi-based 2212 phase have also been discussed.
NEAR RESONANT RAMAN SCATTERING FROM GaAs/AlAs SUPERLATTICES
Authors: HAN HE-XIANG  , WANG ZHAO-PING  , LI GUO-HUA  , JIANG DE-SHENG  , K. PLOOG  ,   中国科学院半导体研究所半导体超晶格国家重点实验室,北京,100083
Published: November 2020

This article presents the results of near resonant Raman scattering measurement of GaAs/ AlAs superlattices at room temperature. A strong enhancement of GaAs LO phonon even modes resulted owing to dipole allowed Fr?hlich interaction in superlattices. Similar to the previous results, the LO phonon even modes in polarized configuration is observed. In contrast to the previous works, however, what we observed in depolarized configuration is the LO phonon odd modes instead of even modes. And it is confirmed that the selection rules of near resonant Raman scattering from LO phonons in this kind of superlattices is the same as that of off resonant scattering. From the second-order Raman scattering, it is confirmed that polarized second-order Raman scattering spectra consist of overtone and combinations of two even modes and depolarized second-order Raman scattering spectra consist of combinations of an even mode and an odd mode. Our experimental results coincide with the predictions using recently developed Huang-Zhu model. A brief discussion on interface modes and their combination with confined modes are also presented.
INFLUENCE OF CHEMICAL ETCHING AND SULFIDE TREATMENT ON InSb(111) SURFACES
Authors: LU CHUN-MING  , LI ZHE-SHEN  , DONG GUO-SHENG  , REN JING  , GONG YA-QIAN  ,   (1)复旦大学应用表面物理国家重点实验室,上海,200433; (2)中国科学院上海技术物理研究所,上海,200083
Published: November 2020

The chemical etched and (NH4)2S-treated InSb(lll) surfaces have been studied using Auger electron spectroscopy and X-ray phctoelectron spectroscopy. It is found that after etching in the CP-4 solution the InSb surfaces are covered by a native oxide overlayer in which the amounts of Sb oxide are obviously more than In oxide. The native oxide layer on the InSb surfaces is completely removed by sulfide treatment and then a sulfide passivation layer forms on the sample surfaces.
ELECTRONIC SPECTROSCOPY STUDIES OF P2S5/NH4OH TREATED GaAs(100) SURFACE
Authors: ZHONG ZHAN-TIAN  , LUO WEN-ZHE  , MOU SHAN-MING  , ZHANG KAI-YAN  , LI XIA  , LI CHENG-FANG  ,   中国科学院半导体研究所,北京,100083;中国科学院物理研究所表面物理国家重点实验室,北京,100080
Published: November 2020

The microscopic characteristics of the GaAs(100) surface treated with P2S5/NH4OH solution has been investigated by Auger electron spectroscopy (AES) and X-ray photoemission spectroscopy(XPS). AES reveals that only phosphorus and sulfur, but no oxygen, are contain-ed in the interface between passivation film and GaAs substrate. Using XPS, it is found that both Ga2O3 and As2O3 on the GaAs surface are removed by the P2S5/NH4OH treatment, moro-ver, gallium sulfide and arsenic sulfide are formed. The passivation film results in a reduction of surfacer state density and improving both electronic and optical properties of GaAs surface.
SOFT DIPOLE MODE OF 11Li, 14Be AND 17B NUCLEI
Authors: REN ZHONG-ZHOU  , XU GONG-OU  ,   (1)南京大学物理系,南京210008; (2)南京大学物理系,南京210008;兰州大学现代物理系,兰州730001
Published: November 2020

Assuming that the 11Li, 14Be and 17B nuclei are composed of the core and two outer neutrons, we have investigated the giant dipole mode of these nuclei by sum rule approach. The excitation energy and the strength of the soft dipole mode are calculated and compared with other theoretical results.
RELATIVISTIC MULTICONFIGURATION DIRAC-FOCK CALCULATION OF FINE-STRUCTURE ENERGY LEVELS AND TRANSITION WAVELENGTHS FOR N-LIKE KXIII, CaXIV, ScXV AND TiXVI
Authors: WANG WAN-JUE  ,   兰州铁道学院基础课部,兰州730070
Published: November 2020

In this paper, by using extended average level (MCDF-EAL) model of relativistic multi-configuration Dirac-Fock code, we have calculated 44 fine-structure energy levels of 2s2p3,2s2p4,2p5,2s22p23s,2s22p23p configurations and 24 transition wavelength of 3s-3p configuration of N-like KXIII; CaXIV, ScXVVV and TiXVI ions which may be the candidates for lasing acton. The calculated values of 3s, 3p configuration of KXIII, CaXIV and ScXV are our present results.
THE AUTOIONIZAT10N SPECTRA OF NEUTRAL YTTERBIUM BY LASER THREE-STEP EXCITATION
Authors: SHEN JUN-FENG  , XU YUN-FEI  , WU BI-RU  , ZHENG YOU-FENG  , LU JIE  , WANG YUN-XIAN  ,   浙江大学物理系,杭州310027
Published: November 2020

The autoionization spectra of Yb have been observed and studied by three-step Laser excitation. Sixteen autoionization levels of Yb in the energy range from 50443 cm-1 to 57750 cm-1 have been investigated. The total angular momentums J of two autoionization levels were determined by a polarization technique.
MODE COUPLING OF INTERCHANGE INSTABILITY IN PLASMAS
Authors: HUANG CHAO-SONG  , LI JUN  ,   中国科学院武汉物理研究所,武汉430071
Published: November 2020

Explosive mode coupling of low frequency interchange instability in partially ionized plasmas is studied. The coupled equations describing coherent wave-wave interactions of the interchange mode are derived. The possibilities of explosive instabilities for the interchange mode are found. It is shown that there exist the explosive coupling of positive energy wave and negative energy wave, positive energy wave and negative dissipation, and negative energy wave and positive dissipation, in the partially ionized plasmas. The theoretical results obtained can be applied to the ionospheric plasma and the mirror-confined plasma.
PHYSICAL MECHANISM OF SYNTHESIZED DIAMOND FILMS ON THE SUBSTRATE OF A STRONG CARBIDE FORMING ELEMENT
Authors: GAO QIAO-JUN  , LIN ZENG-DONG  ,   (1)北京大学物理系,北京100871; (2)北京粉末冶金研究所,北京100075
Published: November 2020

It has been discovered that the physical process of diamond surface metallization is the converse physical process of synthesized diamond film produced by plasma CVD when the substrate is strong carbide forming element and synthesitic temperatures range from 700℃ to 1000℃. We predicted that the physical process of synthesized diamond film should have a structure such as W-WC-diamond film or Si-SiC-diamond film, etc. under this condition.
SCATTERING AND BOUND STATES DUE TO THE POTENTIAL FIELD IN A LATTICE WITH THE LONG-RANGE TOPOLOGICAL DISORDER OF A SCREW DISLOCASION.
Authors: HUANG HENG-JI  , YASUNARI ZEMPO  ,   (1)日本国広岛大学理学部物性学科; (2)延边大学物理系,延吉133002
Published: November 2020

The long-range topological disorder of a screw dislocation provides a peculiar medium for waves in solids. Influences of potential in this medium to electronic states are investigated. A square well potential is employed as a simple example. The potential scattering solution in this medium is successfully obtained in terms of the phase-shift analysis. The unperturbed wave function is not the plane wave but the exact solution of the Aharonov-Bohm equation. The number and position of the bound state levels depend on the coupling of an electron and the topological disorder.
A STUDY OF SECONDARY DEFECTS IN ION- IMPLANTED InSb
Authors: TIAN REN-HE  , LU WU-XING  , LI ZHU-HUAI  , GAO YU-ZUN  ,   (1)北京师范大学低能核物理研究所,北京100875; (2)北京有色金属研究总院,北京100088; (3)华北光电研究所,北京100015
Published: November 2020

In this paper, the secondary defects and their annealing behaviours in Zn+, Mg+, Be+ ion-implanted InSb have been investigated by means of the plan-view transmission electron microscopy (TEM), cross-sectional TEM(XTEM) and Rutherford backscattering and channeling spectroscopy. The result shows that the secondary defects caused by the lighter Be+ ion implantation are much less than that caused by the heavier Zn+ ion implantation. And the ion Mg+, in the region of medium dose (about 1×1031cm2), causes the damage easy to restore. The effect of annealing temperature is investigated from 360℃ to 440℃, and the result indicates that the 360℃ is a better annealing temperature. The figuration of secondary defects in ion-implanted InSb is differant from that in ion-implanted Si: the secondary defects in ion-implanted InSb consist of dislocations and dislocation networks mainly, and the dislocation loop is not dominant, however, precipitates and fault tetrahedras also exist in it.
AN IMPROVED KLEED/CMTA METHOD AND ITS APPLICATION ON Cu(001)1×1 SURFACE
Authors: JIA JIN-FENG  , LI YAN-FANG  , ZHAO RU-GUANG  , YANG WEI-SHENG  ,   北京大学物理系,北京100871
Published: November 2020

In this paper, we investigate the method of kinematic low energy electron diffraction (KLEED) and constant momentum transfer averaging (CMTA). Through a thorough review, we point out that the method has great potential in surface structure determination although it had not been used properly in che past years. This method has been improved greatly in the present work. Firstly, with our own experiment, we demonstrate that the effect of multiple scattering can be eliminated in large part by averaging only a few I-S curves taken with different suitably selected diffraction geometry. Secondly, we show that in KLEED calculation, the constant scattering factor approximation is quite convenient and reasonable for surfaces consisting of same kind of atoms. Thirdly, this work introduces a peak broadening factor to reflect the thermal effect upon the I-V curves which had been neglected in some KLEED calculations. Finally, nonstructural parameters, such as inner potential, mean free path, peak broadening factor and attenuation factor, are optimized to give the best agreement between the calculated and experiment results. Application on Cu(001)1×1 surface indicates that the improved KLEED/CMTA method for surface analyses is simple, reliable and powerful.
MICROWAVE ABSORPTION BY HIGH Tc SUPERCONDUCTORS
Authors: HOU BI-HUI  , CHEN ZHAO-JIA  , XU QIN-LUN  , XU YUN-HUA  ,   (1)结构分析中心; (2)中国科学技术大学材料科学系; (3)中国科学技术大学物理系,合肥230026
Published: November 2020

No-resonant microwave absorption signals in BiPI SbSrCaCuO samples with different si zes and in coarse vacuum were measured, the experiment showed that the signals related to the grain size of the sample and oxygen atmosphere. The signal intensity was proportional to the Meissner state volume which was a shell layer of the skin effeet in the penetration layer.