bluuebunny/crossref_metadata_2025 huggingface dataset:
THEORETICAL STUDY OF NON-EXPONENTIAL PHOTON ECHO DECAYS
Authors: WANG HAI-YU  , HUANG SHI-HUA  ,   中国科学院长春物理研究所激发态物理开放实验室
Published: November 2020

Photon echo decays of several impurity paramagnetic ions are calculated,the historical average of each lattice nuclear spin flip is described by a bivalued random telegraph process,and the spatial average is obtained according to the crystal structure. The results are very close to those of Monte Carlo simulations. From the experimental observations,we obtained that all samples have a universal decay form.
DYNAMIC SCALING OF PHASE SEPARATION IN-AMORPHOUS Cu12.5Ni10Zr41Ti14Be22.5 ALLOY
Authors: LIU JUN-MING  , WU ZHUANG-CHUN  , LIU ZHI-GUO  ,   南京大学固体微结构物理国家重点实验室
Published: November 2020

The dynamic scaling of phase separation in amorphous Cu12.5Ni10Zr41Ti14Be22.5 alloy has been investigated by means of smallangle neutron scattering. A detailed scaling analysis of the scattering function indicates that the dynamic scaling state of the scattering is reached in the early stage of the phase separation. We demonstrate that the dynamic scaling hypothesis can be applied to the phase separation sequence in deeply supercooled liquid.
BLUE UPCONVERSION EMISSION IN Yb,Tm-DOPEDPENTAPHOSPHATE GLASSES
Authors: HAO ZHAO  , CHEN XIAO-BO  , HOU YAN-BING  , SONG FENG  , WANG HONG  , ZHANG GUANG-YIN  ,   (1)南开大学物理系; (2)天津教育学院物理系
Published: November 2020

Much stronger blue emission have been observed in phosphate non-crystals at room temperature,co-doped with Yb3+ and Tm3+ when excited into the Yb3+ 2F7/2 state and the excited states of Tm3+ at 966nm by laser diode.Energy transfer and back transfer between the two rare earth ions,participation of phonons were demonstrated to be responsible for the upconversion process.
PHOTOEMISSION OF COLD-DEPOSITED Ag-BaO THIN FILMUNDER THE ACTION OF ULTRASHORT PULSE LASER
Authors: DAI ZHI-YONG  , WU JIN-LEI  , LIU WEI-MIN  , XUE ZENG-QUAN  , WU QUAN-DE  ,   北京大学无线电电子学系光纤通信国家重点实验室
Published: November 2020

In this paper, the emission of photoelectrons in the Ag-BaO thin film prepared by a cold deposition method has been studied. The quantum yield of the film irradiated by an ultrashort pulse laser with a wavelength of 0.53μm is more than 10-4, and the photoemissive threshold of the film to laser intensity is 10W/cm2. The curve of photoelectric current density vs. laser intensity is not linear. It shows a slope which decreases with increasing light intensity. The quantum yield of the photoemission is variable. This phenomenon is related to the laser intensity and the film characteristics.
NEW EXACT SOLUTIONS OF THE KAUP-KUPERSHMIDT EQUATION RELATED TO A NON-LOCAL SYMMETRY
Authors: HAN PING  , LOU SEN-YUE  ,   (1)宁波师范学院物理系;中国科学院理论物理研究所; (2)舟山师范专科学校物理系
Published: November 2020

Using a non-local symmetry of the Kaup-Kupershmidt (KK) equation, we find a new exact solution in two different ways. Firstly, using the standard prolongation approach, we obtain the finite Lie B?cklund transformation and the single soliton solution of the KK equation. Secondly,combining some local symmetries and the nonlocal symmetry, we get the group invariant solution and obtain the new soliton solution of the KK equation.
THE SIMULATION OF ATOMIC STRUCTURES AND THE-INTERFERENCE FUNCTION OF NANOCRYSTALS
Authors: CHANG MING  , SUN WEI  , XING JIN-HUA  , WANG YU-MING  ,   (1)吉林大学材料科学研究所; (2)天津理工学院光电信息系; (3)天津理工学院机械工程系
Published: November 2020

This paper presents the molecular dynamics simulations of atomic structures of nanocrystals (1—3nm).The X-ray diffraction patterns and the radial distribution functions corresponding to the above nanocrystalline structures were also computed.The results show that the interfacial component exhibits short-range order,and the distortion in crystalline component increases with the decrease of grain size.
SIMULATION AND DISCUSSION ON THE STRUCTURE AND PROPERTIES OF NANOCRYSTALS
Authors: CHANG MING  , SUN WEI  , GUO CHANG-HAI  , YANG BAO-HE  ,   (1)天津理工学院材料科学与工程系; (2)天津理工学院光电信息系; (3)天津理工学院机械工程系
Published: November 2020

This paper provides a molecular dynamics simulation for atomic structure of nanocrystals (1—3nm).Lattice parameter.grain size and lattice distortion were computed by X-ray diffraction simulation.The results show that the basic structure of the grain and grain boundaries are the same in both nanocrystal and coarse grain materials.The decrease of grain size and the increase of volume fraction of grain boundaries lead to different properties of nanocrystals.
STUDY ON THE SINGLE IMPURITY SCATTERING TO THE ONE DIMENSIONAL SPIN 1/2 ELECTRONS
Authors: SHI YUN LONG  , S.N.NABEEL  , ZHANG YU MEI  , CHEN HONG  , WU XIANG  ,   同济大学波耳固体物理研究所
Published: November 2020

The Gaussian wave functional method is applied to investigate the effects of the scattering of a local impurity to the one dimensional conduction electrons,whose low energy behavior can be described by the Luttinger model. Our results show that both the single particle scattering and pair particle scattering are important in this case. The competition between these two scattering mechanisms gives rise to the renormalized masses for both charge and spin density waves. The vanishing of these masses depicts the phase boundaries in the parameter space,different dynamical behaviors are thus determined.
LAX PAIR FORMULATION FOR ONE-DIMENSIONAL-LATTICE SPIN OPEN CHAINS
Authors: ZHOU HUAN-QIANG  ,   重庆大学应用物理系
Published: November 2020

The Lax pair formulation is presented for quantum completely integrable lattice spin open chains.Specifically,the Lax pair for the one-dimensional Heisenberg XXZ open chain with the general boundary terms is explicitly constructed.The construction provides an alternative and direct demonstration for the quantum integrability of the system.
MAGNETIC AND STRUCTURAL PROPERTIES OF Co-Zr/Pd MULTILAYERS
Authors: XU MING-CHUN  , YAN SHI-SHEN  , LIU YI-HUA  , HUANG JI  ,   (1)山东大学实验中心; (2)山东大学物理系
Published: November 2020

Co-Zr/Pd multilayers were prepared by a radio frequency sputtering method.The thickness of the Co-Zr magnetic layers was fixed at 1.8nm,and the thickness of Pd layers was changed from 0.5 to 6nm.The oscillation of saturation magnetization with a period of about 1nm was obtained as the thickness of Pd layers increased.This can be attributed to the oscillation of the polarization of Pd layers.X-ray diffraction showed that magnetic alloy Co-Zr layers were in a crystalline state when the Pd layers were thicker than 1.3nm though a thick Co-Zr single layer was in an amorphous state.The superlattice peaks in the high angle X-ray diffraction patterns showed that there existed a coherent growth between the Co-Zr layers and Pd layers when the Pd layers were thicker than 1.3nm.Moreover,as the thickness of the Pd layers increased,periodically oscillatory phenomena were found both in the crystalline grain size perpendicular to the film plane and in the interplanar distance of the fcc(111) plane.These phenomena may be related to the oscillatory interlayer coupling between Co-Zr magnetic layers through Pd layers.
FIELD EMISSION FROM AMORPHOUS DIAMOND FILMS
Authors: ZHAO JIAN-PING  , WANG XI  , CHEN ZHI-YING  , YANG SHI-QI  , LIU XIANG-HUAI  , SHI TIAN-SHENG  ,   中国科学院上海冶金研究所离子束开放研究实验室
Published: November 2020

One new diamond form,the amorphous diamond (a-D) film,is prepared by filtered arc deposition.The field emission properties and mechanism of a-D film are presented,to our knowledge,for the first time.The field emission current of more than 20μA is detected below a field intensity of 20V/μm. This result is even superior to all previously reported results.The Fowler-Nordheim field- emission behavior has been observed in a-D films.The a-D films have a low work function and negative- electron affinity.
A MODEL OF THE MAGNETICALLY CONFINED SPUTTERING DISCHARGE USED FOR METAL VAPOR LASERS
Authors: LI JUN  , CHEN QING-MING  , LI ZAI-GUANG  , J.J.PAN  ,   华中理工大学激光技术国家重点实验室
Published: November 2020

A model is presented for the magnetically confined sputtering discharge which is being examined to be used in metal vapor lasers.The current-density and spatial dependences of the metal vapor density are described.The predictions are found to be in agreement with the- experiments.
ELECTRICAL PROPERTY AND SHEAR STRENGTH OF A SINGLE CHAIN IN ELECTRORHEOLOGY UNDER DC ELECTRICAL FIELD
Authors: WU CHENG-WEI  , GUO XING-LIN  ,   大连理工大学工程力学研究所
Published: November 2020

The electrical property and shear strength of a single chain formed in silicone oil is studied under dc electrical field,which consists of small humidited glass spheres (diameter is 200—220μm).It is found that the current flowing through a static (no shear) single chain increases with the increase in electrical field strength.The current and the yield shear stress is almost independent of the number (3—5) of the glass spheres to form the chain.The measured average current density and yield shear stress of a single chain versus the field strength is fairly agreement with that predicted theoretically.
ON THE CONDUCTION MECHANISM OF HYDROGENATED NANOCRYSTALLINE SILICON FILMS
Authors: HE YU-LIANG  , YU MING-BIN  , HU GEN-YOU  , ZHANG QIANG  ,   (1)Department of Physics and Astronomy,Louisiana University,Baton Rouge,L.A. 70803,USA; (2)北京联合大学电子自动化工程学院; (3)南京大学固体微结构物理国家重点实验室; (4)西安理工大学物理系
Published: November 2020

A hetero-quantum-dots (HQD) model for hydrogenated nanocystalline silicon films (nc-Si∶H) is proposed. The main contents of our model are: (i) the nanocrystalline grains and their amorphous conterparts have very different band gap and band structures. As a result, they form heterojunction like structures in the interface regions, where the band offset effects dramatically reduce the activation energy and the grains act like quantum dots; (ii) in the presence of an external field, the activated electrons in the quantum dots conduct via quantum tunneling through the interface barriers. By means of the HQD model, we have identified the conduction of nc-Si∶H as thermal assisted tunneling process. Our results show that there are two distinctive regimes for the conductivity of nc-Si∶H:(1) low temperature regime,where there is a simple activation energy ΔE; (2) high temperature regime, where ΔE is enhanced by the temperature effect of the electronic tunneling in the nanoscale particales. The theory is in good agreement with the experiments. Finally, we propose a perfect conductivity formula for nc-Si∶H films.
THE THEORY AND NUMERICAL CALCULATION OF RATE EQUATIONS FOR DUAL WAVELENGTH PULSED LASERS
Authors: SONG FENG  , YAO JIAN-QUAN  , QIAO JIN-YUAN  , CHEN XIAO-BO  , ZHANG GUANG-YIN  ,   (1)南开大学物理系; (2)天津大学激光与光电子研究所
Published: November 2020

The rate equation theory for the dual wavelength pulsed laser is first put forward and the numerical calculation is made,the conclusions are agree with experimental results in references.
ON MICROCAVITY EFFECT IN VERTICAL CAVITY SURFACE EMITTING QUANTUM WELL LASER WITH MULTILAYER HETEROSTRUCTURE REFLECTORS
Authors: GUO CHANG-ZHI  , CHEN SHUI-LIAN  ,   (1)北京大学物理系; (2)清华大学应用数学系
Published: November 2020

Effects of the multilayer heterostructures as the feedback end facets and quantum well structure as the active medium on the lasing behavior in the vertical cavity surface emitting laser (VCSEL) have been analyzed theoretically and systematically. It is shown that the degree of phase matching and the effective length of the distributed reflector have prominent effects on the laser characteristics, and the available low threshold VCSEL may not be due to the microcavity effect. The possible ways to improve the design and the device characteristics have been proposed, both for low threshold and simplified device technology, and for satisfying the condition of microcavity effect in VCSEL.
VALENCE BAND OFFSETS OF Si/ZnS POLAR INTERFACES: A SYNCHROTRON RADIATION PHOTOEMISSION STUDY
Authors: BAN DA-YAN  , FANG RONG-CHUAN  , XUE JIAN-GENG  , LU ER-DONG  , XU SHI-HONG  , XU PENG-SHOU  ,   (1)合肥国家同步辐射实验室;中国科学技术大学物理系; (2)中国科学技术大学物理系
Published: November 2020

Synchrotron radiation photoelectron spectroscopy is used to measure the valence-band offsets for Si/ZnS(111) and (100) heterojunctions. The valence band discontinuities obtained from the measurements are both (1.9±0.1)eV for Si/ZnS(111) and Si/ZnS(100) interfaces,which is in excellent agreement with the theoretical predictions but considerably different from the experimental- result of ZnS/Si(111) reported by Maierhofer et al. This suggests that the commutativity rule of- band offset may not be valid for Si/ZnS polar interface and the reason is discussed.
HIDDEN LOCAL GAUGE INVAR IANCE FOR Osp(2,1) SPIN CHAIN
Authors: WANG MEI-SHAN  , TONG DIAN-MIN  , GUAN XI-WEN  , YANG SHAN-DE  ,   (1)吉林大学物理系; (2)山东师范大学物理系
Published: November 2020

Hidden local gauge invariance for Osp (2,1) spin chain is studied in the frame work of the quantum inverse scattering method. It is found that this model admits an Abel U (1) gauge transformation and the energy spectrum is gauge invariant, where as the eigenvectors and Be the an satz equations are explicitly gauge dependent.
THE OPERATION IN THE STEADY STATE AND SQUEEZING OF QUANTUM NOISE IN TWO-MODE TWO-PHOTON CORRELATED-SPONTANEOUS-EMISSION LASERS
Authors: HU XIANG-MING  , PENG JIN-SHENG  ,   (1)华中师范大学物理系; (2)华中师范大学应用物理研究所
Published: November 2020

Operation in the steady state and squeezing of quantum noise in two-mode two-photon correlated-spontaneous-emission lasers(CEL) are studied via nonliner quantum theory.It is shown that the two-mode two-photon CEL exhibits lasing without inversion and two-mode hysteresis even without triggering.The features of squeezing of quantum noise in the relative amplitude and the average phase are given.
COMPUTER SIMULATION OF AGGREGATION-FRACTALS IN THIN FILMS
Authors: ZENG JIAN-LIN  , BA LONG  , HOU JIAN-GUO  , WU ZI-QIN  ,   中国科学技术大学结构分析开放研究实验室
Published: November 2020

The formation of aggregation fractals in thin polycrystalline bilayer films has been simulated by using the ripening mechanism of nonuniform grains.Based on the analysis of the aggregation of thin films,three parameters are introduced:the velocity factor of grain boundary b,the relaxation range L and the curvature factor U.By using certain values of such parameters,the simulation results are consistent with the patterns formed in experiments.
RELATIONS BETWEEN RHEOLOGICAL RESPONSES OF ER FLUIDS TO HIGH AC FIELD AND THEIR NON LINEAR DIELECTRIC PROPERTIES
Authors: QIU ZHI-YONG  , PAN SHENG  , HU LIN  , LIU XIANG  , ZHOU LU-WEI  ,   复旦大学李政道物理学综合实验室
Published: November 2020

By measuring the dielectric properties,we have found experimentally that the studied ER fluids underwent interfacial polarization and showed nonlinear dielectric properties under high AC field.Considering the dynamical shear stress to be similar to the high field dielectric spectra of the ER fluids,we have established a relation of dynamical shear stress to the high field dielectric spectra of the ER fluids and obtained the lower response times of rheology for two ER fluids.furthermore,it is found the dynamical shear stress of the NaY zeolite ER fluids was related to the intensity of its nonlinear THG,and the humidity of a semiconductor polymer has no effect on the rheological response.The experiment findings have been illustrated.
PHOTOTHERMAL IONIZATION SPECTROSCOPY FOR SHALLOW DONOR IN Si1-xGex EPITAXIAL LAYER
Authors: SHI XIAO-HONG  , LIU PU-LIN  , GONG DA-WEI  , CHEN ZHANG-HAI  , SHI GUO-LIANG  , SHEN XUE-CHU  ,   (1)复旦大学应用表面物理国家重点实验室; (2)中国科学院上海技术物理研究所,红外物理国家重点实验室
Published: November 2020

The 2p± and 3p± excited lines of P donors in Si0.92Ge0.08 epitaxial layer have been observed using photothermal ionization spectroscopy.The ionization energy of P in Si0.92Ge0.08 is 45.51meV according to effective mass approach.The spectral lines of P in Si1-xGex compared with those in pure Si apparently broaden due to alloy disorder effect.
EXAMINING THE IN PLANE POLARIZED INTERCONDUCTION SUBBAND TRANSITION USING GENERALIZED PLANE WAVE METHOD
Authors: ZHANG MAN-HONG  , ZHU BANG-FEN  , HUANG QI  , WANG WEN-XIN  , ZHOU JUN-MING  ,   (1)中国科学院半导体研究所; (2)中国科学院物理研究所
Published: November 2020

The method of the plane-wave expansion of envelope functions,as applied to calculating the subband structures in superlattices,is extended to the 8-band k·p Hamiltonian,in which both Γc1 and Γv15 bands are included.In this method,we can easily take into account of the effects of the nonparabolicity,the discontinuity of the effective masses,the spin-orbit splitting and the inversion asymmetry on subbands.Using this method,we have computed the electronic structure and the optical transition probability of two superlattice systems,in which the in-plane polarized interconduction subband transitions were observed.Our results show that the probability of such transitions is very small.It is thus expected that there might be other machanism to be responsible for the experimental results.
MOLECULAR DYNAMICS STUDY ON THE STRUCTURE-OF β-BaB2O4 GROWTH SOLUTIONS
Authors: LEI YU  , CHENG ZHAO-NIAN  , TANG DING-YUAN  ,   (1)中国科学院福建物质结构研究所; (2)中国科学院上海冶金研究所
Published: November 2020

The structures in β-BaB2O4(BBO) growth solutions, which are BaB2O4-Na2O binary melts with different molar concentrations of Na2O(12.5%,20%,25%,30%), have been studied by molecular dynamics simulations. The simulated B-O radial distribution functions with different Na2O concentrations show that the first peaks become high and sharp with the increasing of Na2O concentration. Based on the instantaneous configurations given by the simulations, the local structures of the binary melts were analyzed by means of the bond order parameter method combined with the statistics of rings and chains. The results indicate that the adding of Na2O as a flux into the melt systems will make more planar BO3 structure units and more isolated BO3, B2O5 and B3O7 clusters while the network in the melts will be greatly weaken, which are all beneficial to the forming boroxol groups B3O6 and the growing of BBO crystal. The statistics also shows that the percentages of B atoms in isolated BO3 and the percentages of B atoms in long chains are in good agreement with the experimental values of volatility and viscosity of hte solution systems, respectively.
THE STATIC MAGNETIC MODE AND THE OSCILLATING ELECTRIC FIELD IN THE INTERACTION OF ELECTRO MAGNETIC FIELD WITH IONIZATION FRONT
Authors: QU WEI-XING  , YU WEI  , ZHANG WEN-QI  , XU ZHI-ZHAN  ,   中国科学院上海光学精密机械研究所
Published: November 2020

Using the electromagnetic dispersion relation in the cold plasma, we research the static magnetic mode that arises in the process of interaction of electromagnetic wave with moving- ionization front driven by an intense laser and find that an oscillating electric field is excited- under a special condition. We also define the condition under which the oscillating electric field appears.
AN IMPROVEMENT IN SELF-CONSISTENT CLUSTER METHOD FOR DETERMINING THE CRITICAL POINT IN ISING SPIN SYSTEM
Authors: ZHENG RUI-LUN  , ZHAO FU-CHUAN  , XIONG GUO-MING  ,   (1)成都科技大学物理系; (2)西南师范大学物理系
Published: November 2020

We show the equivalence between the self-consistent cluster method (SCM) and the modified cluster field method (MCFM). Based on the SCM and MCFM, we propose a new method to- calculate critical points of Ising spin system, the method is demonstrated on the two-dimension square lattice.
ENHANCEMENT OF THE REFLECTIVITY OF Co/C SOFT X-RAY MULTILAYERS AT GRAZING INCIDENCE BY THERMAL TREATMENT
Authors: BAI HAI-LI  , JIANG EN-YONG  , WANG CUN-DA  , TIAN REN-YU  ,   天津大学应用物理系
Published: November 2020

We report a significant increase of the reflectivity of a soft X-ray Co/C multilayer at grazing incidence after low temperature annealing. By monitoring the enhancement of the first order modulation peak on annealing, the effective interdiffusion coefficient as low as -10－25ｍ2ｓ－1 has been measured,which is nearly equal to the true macroscopic interdiffusion coefficient as the modulation wavelength of the Co/C multilayer studied is well above the critical wavelength. The negative true macroscopic interdiffusion coefficient indicates that there is a tendency to phase separation in the Co-C system, which can be interpreted as the positive enthalpy of mixing calculated based on Miedema′s macroscopic atom model. The decrease of reflectivity above some anneal temperature is also discussed and explained as the competition between interfacial sharpness and roughness.
MEASUREMENTS OF ELECTRO-OPTIC AND PIEZOELECTRIC COEFFICIENTS IN PHOTOREFRACTIVE- Ce:BaTiO3 CRYSTAL
Authors: ZHU YONG  , NIU XIAO-JUAN  , LIU HONG-BIN  , P.BARNASCONI  , M.ZGONIK  , P.GNTER  ,   (1)Institute of Quantum Electronics,Swiss Federal Institute of Technology,-ETH H?nggerberg,CH-8093,Zrich,Switzerland; (2)中国科学院物理研究所和凝聚态物理中心
Published: November 2020

We have measured,for the first time,the low frequency (unclamped)electro-optic and piezoelectric coefficients in Ce:BaTiO3 crystals using interferometric techniques.When the piezoelectric contribution to the phase change by a beam passing through the crystals is ruled out,the unclamped electro-optic coefficients of the poled Ce:BaTiO3 single crystals are r42=1945±220pm/V and r13=11.8±1pm/V.Consequently,accurate values of the Pockels coefficients are provided for researching the photorefractive effect and theoretical study of the Ce:BaTiO3 crystal.
A NEW PLASMA MASER SCHEME——THE ION-CHANNEL ELECTRON CYCLOTRON MASER
Authors: LIU PU-KUN  , XIONG CAI-DONG  , LIU SHENG-GANG  , TANG CHANG-JIAN  , QIAN SHANG-JIE  ,   (1)北京大学技术物理系重离子物理研究所; (2)成都科技大学应用物理系; (3)电子科技大学高能电子学研究所; (4)西南物理研究院
Published: November 2020

A new plasma maser scheme,the ion-channel electron cyclotron maser (ICECM) is proposed.By making use of the three-dimensional fluid theory,the dispersion relation of the ICECM with circular orbit electron beam is derived.An ion electrostatic gyro-penitron mode is found,and the growth rate of this new mode is obtained by numerical calculation.
TEMPERATURE DEPENDENCE OF THERMAL EMISSION RATE IN Ce:KNSBN
Authors: JI XUAN-MANG  , AN YU-YING  , LIU JIN-SONG  ,   (1)山西运城高等专科学校物理系; (2)西安电子科技大学技术物理系
Published: November 2020

A method of measuring the ratio of thermal emission rate to the photoexcitation constant is presented.The temperature dependence of this ratio for Ce:KNSBN is calculated by using experiment data of two wave mixing.Results show that the calculations and phenomenological theoretic ones coincide with each other very well.
PHOTOACOUSTIC SPECTRA STUDIES OF NANOMETER SrTiO3
Authors: ZHOU LAN  , ZHANG SHU-YI  , FU SHAO-WEI  , WANG ZHI  , ZHANG LI-DE  ,   (1)南京大学声学研究所近代声学国家重点实验室; (2)中国科学院固体物理研究所
Published: November 2020

Photoacoustic spectroscopy has been used to study nanoscaled SrTiO3 powder with different annealing temperature. The photoacoustic spectra show that the absorption edge of nanoscaled SrTiO3 powder has red shift with the rise of annealing temperature,which demonstrates that the energy gap becomes narrow. The decrease of energy gap is related to the growth of grains and the reduction of lattice parameter. In addition,the absorption band appeared around 700nm is induced by the transition of the captured electrons at the additional energy level of oxigen defects. The variation of the band is strongly dependent upon the sizes of the grains.
INVERSE PROBLEM OF A LASER AMPLIFIER SYSTEM CONTAINING A SPATIAL FILTER
Authors: Zhang Bin  , Lv Bai-Da  ,   四川大学激光物理与化学研究所 成都　610064
Published: November 2020

Starting from the Frantz-Nodvik equation and Huygens-Fresnel diffraction integral and using the fast Fourier transform and successive iteration method, we studied the inverse problem of a laser amplifier system containing a spatial filter, i-e-, to find the initial input temporal pulse profile, am-plitude and phase distributions from the required output temporal, spatial pulse profile and fluence, as well as the given amplifier and spatial filter parameters-
激发介质中螺旋波的波尖运动
Authors: LIU SHEN-QUAN  , LU QI-SHAO  , WANG QI  ,   (1)北京航空航天大学应用数理系，北京  100083; (2)北京航空航天大学应用数理系，北京  100083;中国科学院理论物理研究所，北京  100080
Published: November 2020

We have studied the motion law of spiral waves in two-dimensional excitable media. The motion of the wave front of spiral waves is divided into two parts, i.e., those along the tangent and the normal directions, and the motion equations in the two directions are obtained with the help of the perburbation method. When these equations are used to analyse the spiral tip, the basic motion law of the spiral tip and the structures of twisted rings and long twisted chains are obtained. When these equations are used to analyses the wave front and its disturbance, the result not only shows ordinary spiral shapes but also explains the super-spiral and the double-spiral structures.
A NEURAL NETWORK MODEL FOR UNEQUALLY DISTRIBUTED NEURON STATES AND ITS OPTICAL IMPLEMENTATION
Authors: CHANG SHENG-JIANG  , LIU YUE  , ZHANG WEN-WEI  , SHEN JIN-YUAN  , ZHAI HONG-CHEN  , ZHANG  YAN-XIN  ,   南开大学现代光学研究所和光学信息技术开放研究实验室，天津  300071
Published: November 2020

To avoid the poor performance of the Hopfield model for unequally distributed neuron states and to alleviate the dynamic range constraint of optical system, a clipped model with asymmetric clipping points is proposed. Apart from its easiness for optical implementation, the capacity and capablilty of noisy tolerance are improved greatly, compared with the former clipped model. In addition, a practical encoding method-beam-direction encoding method is proposed to implement the above clipped model. The preliminary experimental results are given.
FOKKER-PLANCK EQUATION IN THE APPLICATION OF FAST WAVE HEATING
Authors: ZHU XUE-GUANG  , KUANG GUANG-LI  , ZHAO YAN-PING  , LI YOU-YI  , XIE JI-KANG  ,   中国科学院等离子体物理研究所，合肥  230031
Published: November 2020

The standard normal distribution for particles in tokamak geometry is usually assumed in fast wave heating.In fact,due to the quasi-linear diffusion effect,the parallel and vertical temperatures of the resonant particles are not equal to each other,so,this will bring some error.For this case,the Fokker-Planck equation is introduced in this paper,and iteration algorithm is adopted to solve the problem well.
GROUND STATE ENERGY LEVEL OF Si-BASE QUANTUM WELLS DETECTED BY ADMITTANCE SPECTROSCOPY
Authors: LIN FENG  , SHENG CHI  , KE LIAN  , ZHU JIAN-HONG  , GONG DA-WEI  , ZHANG SHENG-KUN  , YU MIN-FENG  , FAN YONG-LIANG  , WANG XUN  ,   复旦大学应用表面物理国家重点实验室，上海  200433
Published: November 2020

The admittance spectroscopy technique has been used to study the hole confinement in Si/Si1-xGex/Si and boron highly doped superthin Si quantum wells. Based on the carrier thermal emission medel of the carriers in the well, the value of activation energy derived from the admittance spectra was considered as the distance from the position of the heavy hole ground state in the well to the top of it . For Si/Si1-xGex/Si quantum wells we found the value of activation energy increased with increasing annealing time at 800℃. The phenomena could be explained the annealing-induced interdiffusion of Si and Ge, the interface broadening, the weakening of quantum confinement, the decrease of the position of the heavy hole ground state, and so the increase of the activation energy. At the annealing temperature of 900℃, we only see the decrease of the value of activation energy with increasing annealing time. For boron highly doped superthin Si quantum wells due to quantum confinement effect, we observed the activation energy are different for samples with the same doping density but different well widths.
DOPING CHARACTERIZATION STUDIES OF LAYERED PEROVSKITE SrBi2Ta2O9 FERROELECTRIC THIN FILMS
Authors: YANG PING-XIONG  , DENG HONG-MEI  , CHU JUN-HAO  ,   (1)中国科学院上海技术物理研究所红外物理国家重点实验室，上海  200083; (2)中国科学院上海冶金研究所，上海  200050
Published: November 2020

The characterization of Nb-doped layered perovskite SrBi2Ta2O9 was studied.The mechanism of modification of properties was analyzed.Photoacoustic spectroscopy has been used to study the light absorption of SrBi2Ta2O9 with various Nb contents.The results show that the absorption band at 580nm in the photoacoustic spectroscopy exhibits a red shift with increasing niobium content.The remanent polarization of Nb-doped SrBi2Ta2O9 films depends on the concentration ratio of Ta/Nb.The remanent polarization of the films arose an maximum at the area of Ta/Nb≈1.This may be related to the existence of morphotropic phase boundary.
THE BERRY PHASE OF THE QUANTUM STATE OF A HARMONIC OSCILLATOR WITH TIME-DEPENDENT FREQUENCY AND BOUNDARY CONDITIONS
Authors: LIU DENG-YUN  ,   山西师范大学物理系，临汾  041004
Published: November 2020

The problem of a harmonic oscillator of time-dependent frequency confined in a one-dimensional infinite square well with a moving wall is studied.It is shown that the exact solution and the Lewis invariant operator of the system can be obtained by performing two consecutive gauge transformations on the time-dependent Schrdinger equation.On the basis of the exact solution the Berry phases for the system are calculated by using the geometric concepts such as the geometric distance and geometric length of the curve.
RIGOROUS MODAL THEORY OF PHASE GRATING AND THE TOTAL REFLECTANCE PROPERTY
Authors: FU KE-XIANG  , ZHANG DA-YUE  , WANG ZHI-HENG  , ZHANG QI-ZHI  , ZHANG JING  ,   四川大学物理系，成都  610064
Published: November 2020

This paper discusses the electromagnetic field distribution in phase grating and the rate of diffraction for different diffraction orders by using a rigorous modal theory. Piece wise analytical function is used to express the eigen functions instead of the infinite series in other methods. Stable, fast and accurate recurrent formulae are developed to calculate the reflection transmission and amplitude coefficient matrix that can treat phase grating with any number of groove steps. The numerical results show that there exist bands of total reflectance. The conditions and the physical mechanisms for which the total reflectance occurs are discussed.
UARIATION OF Pr VALENCE VALUE VERSUS OXYGEN CONTENT IN PrBa2Cu3O6+x(x=1,0.3)
Authors: YE HONG-JUAN  , LI BIAO  , LI ZHI-FENG  , XIONG GUANG-CHENG  , WANG RUI-LAN  , LI HONG-CHENG  , LIU PENG  ,   (1)北京大学物理系，人工微结构和介观物理国家重点实验室，北京  100871; (2)西安交通大学电子材料和器件研究室，西安  710049; (3)中国科学院上海技术物理研究所，红外物理国家重点实验室，上海  200083; (4)中国科学院物理研究所超导国家重点实验室，北京  100080
Published: November 2020

The infrared spectra of PrBa2Cu3O6+x (x=1, 0.3) ceramics and films with c-axis orientation are reported in this paper, and the phonon modes in c-axis and ab-plane are distinguished by treating the different vibrational behaviour for film and ceramic samples. Due to the fact that PrBa2Cu3O6+x possesses the similar crystal structure as RBa2Cu3O6+x (R=Y and other rare earth elements), by comparing the phonon spectra, espeacially the B1u (x=1), Eu and A2u (x=0.3) modes of Pr, Y and other rare earth elements, it is found that the valence value of Pr depends on the oxygen content, i.e., the Pr valence is 3+ in PrBa2Cu3O6.3 while it is larger then 3+ in PrBa2Cu3O7.
EXPERIMENTAL STUDY ON INFRARED PHOTORESPONSE OF FERROELECTRIC THIN FILM DETECTOR PbZrTiO3
Authors: CHEN YAN-SONG  ,   中国科学院物理研究所，北京  100080
Published: November 2020

The infrared thin film detector is prepared consisting of (Mn,Sb)-doped PZT and high-temperature superconductor YBCO films. It is of a performance of self-polarization and is able to operate at room temperature. The relationships of infrared photovoltage and photocurrent of the detector with blackbody infrared source temperature, detector sample temperature and chopper frequency, are described.
A THEORETICAL ANALYSIS OF THE FIELD EVAPORATION IN THE CONFIGURATION OF SCANNING TUNNELING MICROSCOPE
Authors: LI ZHI-YANG  , LIU WU  , LI XING-JIAO  ,   (1)华中理工大学固体电子学系，武汉  430074; (2)华中师范大学物理系，武汉  430079
Published: November 2020

An electrothermodynamic analysis of field evaporation in the configuration of scanning tunneling microscope(STM) has been performed. By introduction of an effective binding energy, a formula for the evaporation field in STM has been constructed. The calculated evaporation field for Au-1, for the first time to our knowledge, agrees well with experiment. On the other hand it was found that the classic charge exchange model and image hump model yield very high evaporation field because they require that the adatoms be fully ionized and evaporated to infinity.
NONLINEAR ANALYSES OF THE CORE 3He NUCLEAR REACTION DIFFUSION SYSTEM
Authors: DU JIU-LIN  ,   陕西师范大学物理系，西安  710062
Published: November 2020

This paper gives the nonlinear analyses of the core 3He nuclear reaction diffusion system. It is shown that the system can be led a sudden change to a new supercritical space structure from the original steady——state after the effects of convection and diffusion are taken into account, and the production rate of 3He changes and the total of its density increases. The 3He may be denser in a limited local region so that the reaction rate of 3He+3He is accelerated to have a high energy generation in the region. The understanding for the solar core is also given.
CHAOS OF ATOMIC CLOCK NOISE AND ITS STATISTICAL CHARACTERISTICS
Authors: KE XI-ZHENG  , WU ZHEN-SEN  ,   (1)西安电子科技大学，西安  710071; (2)中国科学院陕西天文台，西安  710600;西安电子科技大学，西安  710071
Published: November 2020

Atomic clock is an extremely precise oscillator,but the increase of precision of it is limited by the noise in it.The period and chaos in an atomic clock is simulated by using a type of Duffing equation.Statistical characteristis of various chaos are discussed.According to the Lyapunov exponent of the atomic clock signal,the chaos in the clock and its motivational mechanism is analyzed.Measured data from CSAO Laboratory during 1994.6.1—8.20 are processed and statistical characteristics of chaos described.
STUDIES OF CNx FILMS DEPOSITED BY MEANS OF MICROWAVE PLASMA CVD METHOD
Authors: XIN YU  , FAN SHU-PING  , DI GUO-QING  , SHEN MING-RONG  , GAN ZHAO-QIANG  ,   苏州大学物理系，苏州  215006
Published: November 2020

CNx films deposited on Si substrates with microwave plasma chemical vapor deposition method are measured and analyzed using Raman scattering,X-ray photoelectron spectrum,X-ray diffraction and scanning electron microscopy techniques.The result of Raman spectrum shows the amorphous graphite peak around 1600cm-1 with the flow ratio of CH4 and N2 below 1∶8.As the flow ratio is equal to 1∶8,a characteristic peak around 2190cm-1 exists,which represents C≡N bond.According to the XPS results,the binding pattern of C and N are seen to be of C—N bond and C≡N bond.There is no diffraction peaks corresponding to β-C3N4 phase in the XRD pattern.The gas pressure has influence on the deposited rate of the film.
PROPAGATION PROPERTIES OF A PLASMA WAVEGUIDE IN A FINITE MAGNETIC FIELD
Authors: HU BIN-JIE  , RUAN CHENG-LI  , LIN WEI-GAN  ,   电子科技大学应用物理研究所，成都  610054
Published: November 2020

The propagation properties of a plasma waveguide in a lossy material under a finite magnetic field are analyzed,particularly for the variations of their propagation constants with plasma parameters,surrounding material and external magnetic field.The analysis show that the propagation properties of such a magnetized plasma-filled waveguide are easy to be controlled compared with those of plasma waveguide to which no external magnetic field or an infinite external magnetic field is applied.
STIMULATED RAMAN SCATTERING IN PLASMAS PRODUCED BY LOW-ENERGY LASER
Authors: JIANG XIAO-HUA  , LI WEN-HONG  , LIU YONG-GANG  , DENG WU  , DING YONG-KUN  , ZHENG ZHI-JIAN  , ZHENG JIAN  ,   (1)西南核物理与化学研究所，成都  610003; (2)中国科学技术大学近代物理系，合肥  230027
Published: November 2020

The result of experimental studies of stimulated Raman scattering (SRS) was report in this paper- When the disk target was irradiated by low-energy laser, the plasma density scale length was short, and the SRS threshold intensity was very high, SRS only occurred in those local ranges where electron density was homogeneous- Multi-material targets and filamentation will produce more those local range, these will increase SRS light-
THE STOCHASTIC RESONANCE AND CHAOS IN THE EVOLUTION OF THE CONSEQUENT ROCK BLOCK SLOPE (INCLINED AND VERTICAL)
Authors: LI JING-HUI  , HUANG ZU-QIA  , WANG CUN-YU  ,   (1)北京师范大学低能核物理研究所，北京  100875; (2)南京大学物理系，南京  210093;北京师范大学低能核物理研究所，北京  100875; (3)中国科学院地质研究所，北京  100029
Published: November 2020

The paper studies the evolution of the consequent rock block slope (inclined and vertical).We find that there exist stochastic resonance and chaos in the process of evolution.When stochastic resonance happens,any weaker stochastic factors can cause large deformation and crook for the slope.The stochastic chaos is induced by the periodical change of the environment,so the forecast of landslide is more difficult to make.
CIRCULAR AND RING WAVEGUIDES WRITTEN AND STORED IN LiNbO3∶Fe CRYSTALS
Authors: LIU SI-MIN  , YANG XIAO-MING  , TIAN GUO-YUN  , ZHANG GUO-QUAN  , SUN QIAN  , XU JING-JUN  , ZHANG GUANG-YING  ,   南开大学物理系，天津  300071
Published: November 2020

We have demonstrated that circular and ring waveguides can be written and stored in photovoltaic and self-defocusing photorefractive medium (LiNbO3∶Fe crystals). The interractions between the ring waveguides have been observed. The methods writing these types of waveguides have important potential applications.
CHARACTERISTIC OF TEMPERATURE-INDUCED CHANGE ON THE STRUCTURE OF LIQUID Al AND Sn
Authors: QIN JING-YU  , BIAN XIU-FANG  , WANG WEI-MIN  , S.I.SLIUSARENKO  ,   (1)山东工业大学材料学院，济南  250061; (2)乌克兰国家科学院金属物理研究所，基辅  142 252142
Published: November 2020

Based on the analysis of the X-ray diffraction data of liquid Al and Sn, temperature-induced structural transformations are found for liquid Al in the range of 1050—1250℃ and for liquid Sn near 800 and 1200℃. The nearest neighbor distance r1 of Al and Sn decreases with the increase of temperature. The structure of liquid Sn is similar to α-Sn on the short-range order length scale. The physical meaning of the correlation radius rc is discussed.
RESONANT SUBBAND-LANDAU-LEVEL COUPLING FOR HIGH-LYING SUBBANDS OF TWO-DIMENSIONAL ELECTRON GASES IN GaAs/AlGaAs HETEROJUNCTION
Authors: CHEN ZHANG-HAI  , HU CAN-MING  , LIU PU-LIN  , SHI GUO-LIANG  , SHEN XUE-CHU  ,   中国科学院上海技术物理研究所红外物理国家重点实验室，上海  200083
Published: November 2020

The resonant subband-Landau-level coupling(RSLC) between the N=1 Landau level of the lowest subband and the N＝0 Landau level of the subbands with quantum index up to i＝5 of two-dimensional electron gases in GaAs/AlGaAs heterojunction was observed under relatively low magnetic field.Several intersubband energies were accurately determined. The experimental results were in good agreement with the self-consistent calculations including the depolarization shift and exciton-like effect corrections.The quantum index dependence of the level splitting due to the RSLC was discussed.
THE EXACT SOLUTION OF ANHARMONIC OSCILLATOR POTENTIAL AND THE DESCRIPTION OF DOUBLE-WAVE FUNCTION
Authors: CHEN CHANG-YUAN  , LIU YOU-WEN  ,   盐城师范专科学校物理系，盐城  224002
Published: November 2020

In this paper,the Schrdinger equation with an anharmonic oscillator potential V(x)=x2/2+g/2x2 is solved.The exact energy equation and the normalized wave function are obtained.The double-wave function quantum theory is applied to gain the time evolution equation to describe the physical quantities of a single motional particle in the anharmonic oscillator.
ENERGY-CURVE UNFOLDING AND QUANTUM CHAOS
Authors: JIANG YI-MIN  ,   中国原子能科学研究院，北京  102413
Published: November 2020

It is indicated that when observing the phenomenon of quantum chaos with the help of energy-level curves,except an energy-unfolded spectrum to be required,an unfolding procedure for the curve parameter should be considered too.A general method for the parameter unfolding could be realized by normalizing the mean-square-root of slopes of level curves.If the curves are in average declined,an energy shift is also needed for eliminating this,before the parameter unfolding process is carried out.Discussions of the curvature of so unfolded level-curves are made,in connection with the Gaspard-Rice-Mikeska-Nakamura's formula of dimensionless curvature.
STUDIES OF 25MeV/u40Ar INDUCED REACTIONS AND THEIR FORWARD EMITTED PRODUCTS
Authors: LIN YUAN-GENG  , ZHAN WEN-LONG  , GUO ZHONG-YAN  , ZHOU JIAN-QUN  , ZHAO YOU-XIONG  , LIU GUAN-HUA  , WANG JIN-CHUAN  , LUO YONG-FENG  , LEI HUAI-HONG  , QI ZHONG  , ZHANG WAN-SHENG  , QIN LI-JUN  ,   中国科学院近代物理研究所，兰州  730000
Published: November 2020

The invariant velocity spectra of the forward emitted fragments in the 25MeV/u40Ar induced reactions are investigated,their parallel momentum and reduced parallel momentum distribution widths of the fragments are extracted.Furthermore,the emitted products are summarized.
STUDIES OF INTERFACE FORMATION OF Co/GaAs(100) AND THE MAGNETIC PROPERTY OF ULTRATHIN Co FILMS
Authors: ZHANG FA-PEI  , XU PENG-SHOU  , XU FA-QIANG  , LU ER-DONG  , SUN YU-MING  , ZHANG XIN-YI  , ZHU JING-SHENG  , LIANG REN-YOU  ,   (1)中国科学技术大学合肥国家同步辐射实验室，合肥  230029; (2)中国科学技术大学合肥国家同步辐射实验室，合肥  230029;中国科学技术大学结构分析开放实验室，合肥  230026; (3)中国科学技术大学结构分析开放实验室，合肥  230026
Published: November 2020

Synchrotron radiation photoemission and ferromagnetic resonace(FMR) measurement have been used to study the interface formation of Co/GaAs(100) as well as the magnetic property of ultrathin Co films.The results show strong interface disruption and reaction between overlayer and substrate at low Co coverage(～0.2nm),At the coverage of 1nm,a stable interface forms.The Ga atoms in bulk GaAs may exchange with Co atoms and diffuse into Co overlayer,while a certain amount of As reacts with Co atoms,forming stable Co-As bonding.These reaction products lie in the narrow region near the interface(0.3—0.4nm).The remanent part of As will segregates on the surface of Co overlayer.Based on a theoretical model,the interface structure and concentration profile are discussed in detail.The FMR result demontrates that the ultrathin Co film consists of good-quality crystals and has a chemical homogeneity.
DECOUPLED SQUEEZED LANDAU STATES
Authors: TIAN XU  , HUANG XIANG-YOU  ,   (1)北京大学物理系，北京  100871; (2)武汉汽车工业大学基础课部，武汉  430070
Published: November 2020

Decoupled squeezed states for the Landau System (planar charged particle moving in a uniform magnetic field) are builded. It is convenient to use these states to describe the circular motion of the charged particle. The results obtained do not depend on gauges.
STUDY OF STRUCTURE OF METALLIC CLUSTERS EMBEDDED IN ORGANIC THIN FILM (I)
Authors: OUYANG MIN  , HOU SHI-MIN  , LIN LIN  , LIU WEI-MIN  , XUE ZENG-QUAN  , WU QUAN-DE  , XIA ZONG-JU  , ZOU YING-HUA  ,   (1)北京大学电子学系，北京  100871; (2)北京大学物理系，人工微结构和介观物理国家重点实验室，北京  100871
Published: November 2020

Two kinds of metal-organic complex thin films Ag-TCNQ and Ag-BDCB have been prepared by the modified thermal evaporation method.transimssion electron microscopy (TEM) and ultraviolet—visible (UV—Vis) spectroscopy were applied to the study of the structures of the metal-organic complex thin films.The TEM and UV—Vis spectroscopic results show that the two kinds of thin films belong to the system of metallic clusters embedded in π-conjugated organic media.
SPONTANEOUS SHRINKING OF THE SECOND TYPE OF DUMBBELL DOMAINS SUBJECTED TO BOTH STATIC BIAS FIELD AND IN-PLANE FIELD
Authors: SUN HUI-YUAN  , TANG GUI-DE  , GUO GE-XIN  , NIE XIANG-FU  , WANG YUAN-FEI  , HAN BAO-SHAN  ,   (1)河北师范大学物理系，石家庄  050016; (2)中国科学院物理研究所磁学国家重点实验室，北京  100080
Published: November 2020

Spontaneous shrinking of the second type of dumbbell domains (IID) subjected to both static bias field (Hb) and in-plane field (Hip) were investigated experimentally.It was found that this phenomenon depends on the amplitude,as well as the direction of Hip.In terms of a series of photographs,it was shown that the spontaneous shrinking of those IIDs perpendicular to Hip occurs earlier,and the spontaneous shrinking of those IIDs parallel to Hip occurs later.In addition,it was confirmed that IIDs lose a part of vertical Bloch lines (VBLs) in their walls in the process of spontaneous shrinking.
PROPOGATION OF LIGHT THROUGH MEDIA CONSTRUCTED FOLLOWING THE SPECIAL QUASILATTICES SEQUENCE
Authors: YANG XIANG-BO  , LIU YOU-YAN  ,   (1)广东工业大学数理系，广州  510090；华南理工大学物理系，广州  510641; (2)华南理工大学物理系，广州  510641
Published: November 2020

The characteristics of the construction of one-dimensional Fibonacci-class quasilattices (1D FC(n)) have been described.By means of the electric field theory and the properties of unimodular matrix,we studied extensively the transmissive properties of light through multilayers constructed following 1D FC(n) sequence and found that the transmission coefficient for FC(2m) is switch-like(on-off-on-off-…) and there exist six circulative properties for the one of FC(2m+1) around δ=π(1/2±k), in which the number of transmission coefficient shows interesting properties.
STUDY OF MULTIPHOTON SELECTIVE EXCITATION OF DIATOMIC MOLECULES IN INTENSE LASER FIELDS BY USING THE QUADRATIC ANHARMONIC MODEL
Authors: DAI YING  , DING SHI-LIANG  ,   (1)山东大学化学系，济南  250100; (2)山东大学化学系，济南  250100;山东师范大学物理系，济南  250014
Published: November 2020

In this letter,we use the quadratic algebraic Hamiltonian that represents a non-rotating Morse oscillator to study the state-selective excitation of a diatomic molecule placed in the intense laser field of an infrared laser.The selective transition probabilities of HF molecule and the averaged absorb energies are calculated.
COMPUTER SIMULATION OF THE THERMAL FLOW INSIDE THE HIGH PRESSURE CELL(Ⅱ) CALCULATING RESULTS AND ANALYSIS
Authors: SUN ZONG-QI  , XU JI-AN  , XIE HONG-SHEN  ,   (1)地球科学研究所，台北  11529; (2)中国科学院地球化学研究所，贵阳  550002; (3)中国科学院金属研究所，沈阳  110015
Published: November 2020

The static and non-steady distributions of temperature inside a high static pressure cell were calculated numerically by using the method provided by our previous work for different pressure media and heating elements. The results of numerical calculation for static and non-steady distribution of temperatures are all agree with the approximate analytic results. The thermal conductivity of pyrophyllite obtained from the experimental slope of maximal value of the temperature versus heating power is in agree with the special thermal conductive experimental value.
STRUCTURE OF SINGLE VORTEX IN A s+id WAVE SUPERCONDUCTOR
Authors: NIU JIN-HAI  , ZHOU SHI-PING  , XU KE-XI  ,   上海大学物理系，上海  201800
Published: November 2020

The structure of a single vortex in a superconductor with s+id symmetry is given employing a recently developed Ginzburg-Landau theory by the method of relaxation iteration.We also studied the variation of respective components s and d with the temperature and magnetic field.Finally,we give the curve of the upper critical field along with transition temperature in mixed wave consideration.Our result is in qualitative agreement with the experiment data.
PROPERTY, APPLICATION AND PREPARATION OF DIAMOND-LIKE FILM
Authors: LIANG FENG  , YAN XUE-JIAN  ,   复旦大学材料科学系，上海　200433
Published: November 2020

We present the structure features of diamond-like films, discuss the relation between the coefficients in the preparation of diamond-like films and analyse how these coefficients affect the structure and property of the films in detail.
CHANGES OF SURFACE ELECTRON STATES OF InP UNDER SOFT X-RAYS IRRADIATION
Authors: YANG ZHI-AN  , JIN TAO  , YANG ZU-SHEN  , QUI RE-XI  , CUI MING-QI  , LIU FENG-QIN  ,   (1)新疆大学物理系，乌鲁木齐　830046; (2)中国科学院高能物理研究所,北京  100039; (3)中国科学院新疆物理研究所，乌鲁木齐  830011
Published: November 2020

Changes of surface electronic states of InP under 1 keV X-ray irradiation is studied by X-ray photoelectron spectroscopy (XPS) and ultraviolet ray energy spectroscopy (UPS). Our results show that the soft X-ray irradiation has little effect on In atoms but much on P atoms. We analysed the mechanism of irradiation and explained the major effect.