bluuebunny/crossref_metadata_2025 huggingface dataset:
BLOCKSPIN SCHEME AND THE CLUSTER-UPDATING ALGO-RITHMS FOR THE QUANTUM SPIN SYSTEMS
Authors: YING HE-PING  , U. J. WIESB  ,   (1)Institute for Theoretical Physics,Univertity of Bern,CH-3012 Bern,Switzerland; (2)浙江近代物理中心,浙江大学物理系,杭州310027
Published: November 2020

In this paper, we proposed a blockspin scheme and developed the usual cluster-updating algorithms for the one-and two-dimensional quantum spin systems, saying s=1/2 isotropic Hei-senberg models. The results for he ferro-and antiferro-magnet chains showed that the criti-cal slowing down (CSD) was indeed eliminated, and so it offered a possibility to improve the estimations in the lower-temperature region. We expect that the algorithms could also be ap-plied to the anisotropic or/and the higher-spin cases, as will as some other interesting models, such as eight-vortex lattice model and low-dimensional Fermi-systems.
A STUDY OF SUq(2) COHERENT STATE BY MAKING USE OF q-DEFORMATION HARMONIC OSCILLATORS REALIZATION OF SUq(2) QUANTUM ALGEBRA
Authors: HAO SAN-RU  ,   长沙水利电力师范学院物理系,长沙410077
Published: November 2020

The SUq(2) coherent state is constructed by making use of the q- deformation harmonic oscillators realization of the SUq(2) quantum algebra. It is shown that the basis functions of the SU, (2) quantum algebra is orthogonal. The completeness and normalizing property of the SUq(2) coherent state is studied. We point out that the coherent property of the SUq(2) co-herent state is affected by q parameter, and show more generalility than the usual SU(2) co-herent state.
EVOLUTION OF A VELOCITY-DEPENDENT FORCED QUANTUM ANHARMONIC OSCILLATOR
Authors: R. D. KHAN  , ZHANG JIE-LUN  , DING SHENG  , SHEN WEN-DA  ,   上海科学技术大学物理系,上海201800
Published: November 2020

The exact solution to a velocity-dependent forced quantum anharmonic oscillator is de-rived by using the integral oprators and iteration method. The time development of the dis-placement and momentum operators of the anharmonic oscillator is given. These operators are represented as a Laplace transform and a subsequent inverse Laplace transform of suitable functionals.
CALCULATION OF COLLISION BROADENING OF WATER VAPOR ABSORPTION LINES IN THE VISIBLE REGION
Authors: ZHANG YIN-CHAO  , GONG ZHI-BEN  ,   中国科学院安徽光学精密机械研究所,合肥230031
Published: November 2020

The least-squares fitting of the observed energy levels to the Watson' s Hamiltonian con-stants of water vapor vibrational states (202), (122), and (004) had been performed. Using these constants and the revised quantum Fourier transformation (namely QFT*) method, we calculated the N2-broadened widths of the observed absorption lines for (202) band. Also we obtained the N2-broadening widths and temperature dependences of lines in the R(l ,1) branch of (202), (122), and (004) bands. The agreement between calculation and experiment show that the fitting to the Hamiltonian constants is reasonable and the QFT* method can be ap-plied to calculate the collision broadening of water voapor in the visible region. In addition, the calculated results indicated that in the visible region the collision broadening and line-width temperature dependence vary with the rotational and vibrational quantum numbers, and the maximum values of these two parameters might be two times as large as the corresponding minmum value.
GROWTH AND STUDY OF TWO-COMPONENT PIEZOELECTRIC SINGLE CRYSTAL ALUMINIUM GALLIUM PHOSPHATE (Al1-xGaxPO4)
Authors: XIA HAI-RUI  , QIN ZI-KAI  , YUAN WU  , LIU SHI-FANG  , HAN JIAN-RU  ,   (1)山东大学晶体材料研究所,济南250100; (2)山东大学物理系,济南250100; (3)山东大学物理系,济南250100;济宁师范专科学校; (4)山东大学物理系,济南250100;深圳赛格南星电子有限公司
Published: November 2020

The non-ferroelectric two-component piezoelectric single crystal Al0.088Ga0.12PO4 grown from solution by slow heating method is obtained. We determine the structure of the single crystal by results of three kinds of measurements. Finally, the electro-elastic constants of this single crystal as a new kind of piezoelectric material are given.
ELECTRON PARAMAGNETIC RESONANCE OF V4+-DOPED KTiOPO4 SINGLE CRYSTAL
Authors: HAN SHI-YING  , SUI YUN-XIA  , WANG JI-YANG  , LIU YAO-GANG  , WEI JIN-QIAN  ,   (1)南京大学现代分析中心,南京210008; (2)山东大学晶体材料研究所,济南250100
Published: November 2020

EPR spectra of V4+-doped single crystal (V4+/KTP) were observed in X band at room temperature. The analysis on the spectra shows that the V4+ ions may occupy two kinds of crystallographically diffrent sites, each kind of sites contains four magnetically nonequivalent but crystallographically equivalent sites. The angular varitions of EPR hyperfine lines were measured with the external magnetic field in three mutually perpendicular planes. The principal values and direction cosines of the principal axes of the g and A tensors, were computed by a least-squares fitting procedure. These main results reveal that the V enters the lattice to substitute for the Ti ion of KTP to form V site with a tetragonally distorted octahetral symmetry. The orientations of all eight Ti ion sites substituted in an unit cell of KTP have been determined.
q -DEFORMATIONS OF THREE-DEMENSIONAL ISOTROPIC OSCILLATOR AND THEIR WAVE FUNCTIONS
Authors: PAN FENG  , XU PEI-JUN  ,   (1)辽宁师范大学物理系,大连116022; (2)辽宁师范大学物理系,大连116022;ICTP,P.O.Box 586,34100 Trieste,Italy.
Published: November 2020

In this paper, three kinds of q -deformations of three-dimensional isotropic oscillator are discussed in detail, the Hamiltonians of which have S3, SUq(2) , and Uq(3) symmetries, repectively. Especially, in the third case a specific realization of Uq(3)?SOq′ (3) is given. Relation between the q -deformed oscillator and the classical one is also discussed.
A STUDY ON THE RECONSTRUCTION OF DIAMOND(100) SURFACE WITH LOCAL DENSITY FUNCIONAL THEORY
Authors: YE LING  ,   复旦大学物理系,上海200433
Published: November 2020

The reconstruction of diamond C(100) surface is studied with local density functional theory and extended numerical basis set. A cluster C49H36 is adopted to simulate the surface, where H atoms are saturation atoms. According to the calculation of forces exerted on the surface C atoms, an optimized C(100) surface atomic structure is achieved with the surface dimerized bond length, C-C, equals 1.415?. The nature of the bonding and the corresponding electronic structures, especially the distribution of surface states, are investigated and discussed.
DESTRUCTION OF PEAK SWITCHING IN STRONG-FIELD AUTOIONIZATION PHOTOELECTRON SPECTRA
Authors: FENG JIAN  , GAO XUE-YAN  ,   (1)山东大学光学系,济南250100; (2)山东省聊城师范学院物理系,聊城252059
Published: November 2020

In this paper, the effect of the spatial inhomogeneity of the laser field and the size of detector acceptance angle or aperture on strong-field autoionization photoelectron spectra is investigated. It is shown that the photoelectron spectra are drastically affected by the above factors , for small detector acceptance angle or aperture size, peak switching appears in the photoelectron spectra, but for large detector acceptance angle or aperture size, peak switching is destroyed completely.
RELATIVISTIC MICROSCOPIC OPTICAL POTENTIALS FOR NUCLEON-NUCLEUS IN THE IMPROVED LOCAL DENSITY APPROXIMATION
Authors: ZHU PING  , XU JIA-BAO  , GAO QIN  ,   杭州大学物理系,杭州310028
Published: November 2020

Based on Walecka model, the refativistic microscopic optical potentials (RMOP) for nu-cleon-nucleus are investigated in the improved local density approximation (ILDA). The RMOP in ILDA, which include the effect of interaction range, are obtained by folding RMOP in LDA with Gaussian form factors. The parameters in Gaussian form factors are adjusted to fit the empirical values of the volume integral and root mean squar radius of the optical potential for p-Ca. By analysing the elastic scattering of proton from nuclei, we get a better agreement of ILDA with experiment data than that of LDA.
A GENERAL THEORY OF SPONTANEOUS-EMISSION LINE SHAPE OF TWO ATOMS
Authors: LUO ZHEN-FEI  , XU ZHI-ZHAN  , XU LEI  , LIANG SHI-DONG  ,   (1)佛山大学物理系,佛山510000; (2)中国科学院上海光学精密机械研究所,上海201800; (3)中国科学院上海原子核研究所,上海201800
Published: November 2020

The spontaneous-emission line shape of two atoms interacting with a vacuum field in an ideal cavity with different couplings is investigated. In general, the "vaccum-field Rabi splitting" will show a 12-peaked structure. The 2-peaked structure for one atom and 6-peaked structure for two identical atoms may be obtained as two examples.
MOBILITY EDGE IN THE AUBRY MODEL OF ONE-DIMENSIONAL INCOMMENSURATE SYSTEMS
Authors: WANG CHUAN-KUI  , SUN JIN-ZUO  , WANG JI-SUO  , WANG WEN-ZHENG  ,   (1)聊城师范学院光通信研究所,聊城252000; (2)中国高等科学技术中心(世界实验室)协联,成员
Published: November 2020

In this paper, we show that: when the wave vector Q is not infinitesimal but sufficiently small, there exist mobility edges in the region of V c=±|2-V|, The result is different from that of duality theory.
RAMAN SCATTERING STUDY OF LO PHONON-PLASMON COUPLED MODE IN HEAVILY CARBON DOPED p-TYPE GaAs
Authors: QI MING  , LUO JIN-SHENG  , J. SHIRAKASHI  , S. NOZAKI  , K. TAKAHASHI  , E. TOKUMITSU  , M. KONAGAI  ,   (1)东京工业大学电气电子工学科,东京152,日本; (2)东京工业大学电子物理工学科,东京152,日本; (3)西安交通大学电子工程系,西安710049
Published: November 2020

The Raman scattering by LO phonon-plasmon coupled (LOPC) mode in heavily carbon doped p-type GaAs grown by MOMBE has been studied. It was shown by the lineshape analysis based on a theoretical model for the Raman scattering rate that the p-type GaAs has only one LOPC structure in contrast to the two modes in n-type doping case. The influence of heavily doping on the Raman spectroscopy was also discussed based on the experimental results. The linewidth broadening and the red shift of the LOPC mode scattering peak at the ul-trahigh doping level are induced by the crystalline disorder and effects of lattice deformation.
POISSON-LIE STRUCTURE OF LAX-PAIR MATRIX OF INTEGRABLE CLASSICAL NON-LINEAR SIGMA MODEL UNDER THE MOVING FRAME
Authors: DING XIANG-MAO  , WANG YAN-SHEN  , HOU BO-YU  ,   西北大学现代物理研究所
Published: November 2020

We give out the Poisson-Lie brackets of non-linear σ model in O(3)/O(2) sy-mmetric space. Covariant properties from fixed frame to moving frame are discussed, in the process the covariant decomposing methods are used. The r-s-matrix independent of field except the connection of the space is found.
FLUORESCENCE OF NANOSTRUCTURED Al2O3 BULKS IN VISIBLE LIGHT RANGE
Authors: MO JI-MEI  , ZHANG LI-DE  , ZHAO TIE-NAN  , YAO XIAO-HUI  ,   (1)中国科学技术大学材料科学与工程系; (2)中国科学技术大学材料科学与工程系,中国科学院固体物理研究所; (3)中国科学技术大学材料科学与工程系,中国科学院物理研究所
Published: November 2020

Fluorescence spectra of nanostructured Ａｌ2Ｏ3 bulks, which were not doped by Cr, were investigated systematically. The results show that for nanostructured samples of boehmite, η－Ａｌ2Ｏ3 and γ－Ａｌ2Ｏ3, two broad fluorescence bands (ｐ1 and ｐ2) appear, and ｐ1 and ｐ2 bands are located in the wavenumber ranges of 20000 to ～14500cm－１ and ～14500 to l1500cm－１, respectively. The ｐ1 band can be attributed to the trace impurity (Cr3+ ions) fluorescence. This is consistent with the previous results for Cr doped Ａｌ2Ｏ3. The ｐ2 band is a new fluorescence band. Finally, the stress is put on the discussion of conditions and the mechanism of the appearance of the ｐ2 band.
SPECTRAL STRUCTURES OF SHALLOW DONORS IN QUANTUM DOTS
Authors: CHEN XI  , ZHU JIA-LIN  ,   清华大学现代应用物理系
Published: November 2020

Using the hydrogenic-effective-mass theory, the spectral structure is calculated employing a linear variational method and presented for a hydrogenic shallow donor in a spherical quantum dot of GaAs-Ga１－ｘＡｌｘAs with the donor ion located at arbitary position. It is an extension of the calculation in Ref.[10]. The quantum-level sequence and degeneracy for the single electron state in the dot are discussed. Results of calculations indicate that the quantum-level structures depend on the dot radius and the ion position apparently, and that it is important to choose a proper set of base functions in the calculation.
SYMMETRY STRUCTURE OF 2+1 DIMENSIONAL BILINEAR SAWADA-KOTERA EQUATION
Authors: LOU SEN-YUE  , YU JUN  , WENG JIAN-PIN  , QIAN XIAN-MIN  ,   (1)丽水师范专科学校物理系; (2)宁波师范学院物理系,中国科学院理论物理研究所,中国高等科学技术中心(世界实验室); (3)绍兴师范专科学校物理系
Published: November 2020

We established a formal series symmetry theory for a type of generalized 2+1 dimensional bilinear equation in two different ways. Starting from a known time in-dependent symmetry or an arbitrary function of 1-D space, we can get a formal series symmetry with an arbitrary function of time t. For the 2+1 dimensional bilinear Sawada-Kotera equation, there exist six truncated symmetries. These truncated symmetries constitute an infinite dimensional Lie algebra. Some significant subalge-bras such as the Virasoro algebras are also given.
MICROWAVE POWER FREQUENCY SHIFT IN THE 87Rb ATOMIC FREQUENCY STANDARD
Authors: CHU XIN-ZHAO  , LIU SHU-QIN  , DONG TAI-QIAN  ,   北京大学无线电电子学系
Published: November 2020

According to our measurement, the coefficient of microwave power shift in the 87Rb frequency standard is always positive. The previous explanation about microwave power shift can not explain this phenomenon. The theory presented in the present paper, starting from the view of AC Zeeman effect caused by microwave field, can explain it.
DEGENERATE TWO-PHOTON LASERS: LASING WITHOUT INVERSION AND INVERSION WITHOUT LASING
Authors: HU XIANG-MING  ,   华中师范大学应用物理研究所
Published: November 2020

In this paper, it is revealed that, degenerate two-photon lasers can show both lasing without inversion and without lasing, for two proper atom-field coupling coefficients, under the condition of equal atomic decay rates, not too large single-photon detunings, and not too saturation.
EFFECT OF ORIENTATION ON RADIAL DISTRIBUTION FUNCTION
Authors: CHEN JI-ZHOU  , WANG JUN-QIAO  , HAN FU-TIAN  ,   (1)天津理工学院; (2)中国广州分析测试中心
Published: November 2020

The errors may be introduced in the process of measurement and evaluation for preparing radial distribution function (RDF), They will cause the error distortion that RDF can be partly upset. RDF method is based on structual isotropy of amor-phous materials, however, a structural anisotropy, i.e orientation, hes been found in amorphous polymeric, inorganic and metallic materials. The orientation will greatly affect RDF, and will lead to a new distortion that RDF may be wholly upset. Obvirously, if it is not given due regard, a misinterpretation on RDF can occur. The feature of the so-called orientation distortion is discussed in the present paper.
TRANSITION TEMPERATURE AND THERMODYNAMIC PROPERTIES OF SUPERCONDUCTORS AS ANISOTROPIC FERMI SYSTEMS
Authors: YI XUE-XI  , WANG XI-FU  , WANG ZHI-XING  ,   东北师范大学物理系
Published: November 2020

In this paper, we regard the superconductor as an anisotropic Fermi system, taking into account topological transitions of the electronicenergy. We have worked out the relationship between the transition temperature Tｃ and chemical potential, and other thermodymanic quantities on the basis of the model of three overlapping energy bands. The results are in agreenment with experimental data.
INTERACTION POTENTIAL DRIVED BY INVERSION SCATTERING THEORY FOR EXTREMELY LOW-ENERGY e-He CO-LLISIONS
Authors: CHEN XUE-JUN  , WANG YAN  , CAO XIAO-PING  ,   清华大学现代应用物理系
Published: November 2020

Based on the experimental data of differential cross sections of e-He elastic collisions at 2 eV, the e-He interaction potential has been drived theoretically by the inversion scattering method. Using the obtained potential, the differential cross sections of e-He elastic collissions at 2,5eV were calculated theoretically. The results show that: 1)The e-He interaction potential at extremely low-enery is real and local one and has the characters of strong Van der Waals potential. 2) The WKB inversion is fail for the present case, but the quantum inversion is still successful. 3) The quantum inversion potential can produecd good reaults in agreement with experimental data.
THE kTH POWER SQUEEZING OF THE FIELD AMPLITUDE IN SQUEEZED NUMBER STATES
Authors: WU XING一LONG  ,   南京大学物理系
Published: November 2020

We have studied the amplitude kth power squeezing in squeezed number states and derived the general formulas related to the squeezing effect. The squeezing propereies have been obtained for the cases of k=1,2,3 and 4 by means of numerical calculation, The results show that the AKPS has favourable applications in optical communication.
MEASUREMENT OF THERMALLY INDUCED NONLINEARITY BY TWO MODIFIED Z-SCAN METHODS
Authors: TIAN JIAN-GUO  , ZANG WEI-PING  , ZHANG GUANG-YIN  ,   南开大学物理系
Published: November 2020

In this paper we suggest two modified Z-scan methods with enhanced sensitivity compared with common Z-scan method. By using these methods we measure thermally induced nonlinearity of liquid. The experimental results agree essentially with the theories.
STUDIES OF FLUX CREEP IN Y0.9Eu0.1Ba2Cu3O7-δ
Authors: CAI MENG  , FANG MING-HU  , ZHANG XUAN-JIA  , JIAO ZHENG-KUAN  , ZHANG QI-RUI  , RONG XI-SHEN  , ZHAO BAI-RU  ,   (1)浙江大学物理系; (2)中国科学院物理研究所
Published: November 2020

The magnetic hysteresis and relaxation behaviors in ＹＢａ2Ｃｕ3Ｏ7-δ and Ｙ0.9Ｅｕ0.1Ｂａ2Ｃｕ3Ｏ7-δ samples were measured in the wide ranges of temperature (4.2-80K) and field (0-8 T). The M(t), Jc(T) and Ueff(J) relationships in these samples were studied and several theoretical models were tested. The results show:(1)Both the effective pinning energy and critical current density in the absence of flux creep are obviously higher in Ｙ0.9Ｅｕ0.1Ｂａ2Ｃｕ3Ｏ7-δ than in ＹＢａ2Ｃｕ3Ｏ7-δ sample, which indicates the introductions of new pinning centers with larger pinning energy by the partial substitution of Eu for Y. (2) Compared with other models, the collective flux creep theory gives the best description on our experimental results and thus this work provides a new experimental evidence for this theory.
A STUDY OF THE NONLINEAR POLARIZATION CONDITIONS OF SILICA
Authors: BAI YING-XIN  , ZHANG ZHU-HONG  , FAN DIAN-YUAN  , WANG ZHI-JIANG  , ZHANG GUO-QING  ,   (1)中国科学院上海光学精密机械研究所; (2)中国科学院物理研究所
Published: November 2020

It is experimentally shown that temperature and static electrical field (or direct current field) play important roles in the nonlinear polarization of silica and there is a temperature threshold. For an optical fiber, the nonlinear polarization depends on the average power density in the preparing optical fiber and there is an average power density threshold. Finally, some theoretical analyses are made about them.
SYMBOLIC DYNAMICS OF THE ONE-DIMENSIONAL BIQUADRATIC MAP WITH TWO PARAMETERS
Authors: XIE FA-GENG  ,   北京师范大学物理系,中国科学院理论物理研究所
Published: November 2020

The one-dimensional biquadratic map is studied by means of symbolic dynamics in two parameter plane. The skeleton of superstable orbits and the joints in the kne-ading plane have been constructed. A criterion of the existence of topological chaos has been given according to the topological entropy.
LASING WITHOUT INVERSION: GAIN AND SATURATION
Authors: LUO ZHEN-FEI  , XU ZHI-ZHAN  , LIN FU-CHENG  ,   中国科学院上海光学精密机械研究所
Published: November 2020

The solution for the equations of atomic density matrix is obtained, without resorting to any approximation, in the Ξ-type of three-level system with lower-level coherence. The conditions on pumping are analyzed in the strong-coherence case for lasing without inversion and the saturation term is derived.
TIME-DOMAIN ANALYSIS OF THE MODE一LOCKED PRO-CESS BASED ON A NOVEL NONLINEAR COUPLED CAVITY
Authors: Lü ZHEN-GUO  , ZHOU ZUO-PING  , WU QI  , LI QING-XING  , YU ZHEN-YIN  ,   (1)华南理工大学应用物理系; (2)中山大学超快速激光光谱学国家重点实验室
Published: November 2020

Dynamic processes of the modelocked laser based on a auxiliary coupled cavity containing a nonlinear frequency-doubling crystal has been systematically studied in this paper. And, the specific formulas of the output pulse width of this modelocked laser in instantaneously dynamic equilibrium are given. Moreover, the results of nu-merical analysis and calculation show that its modelocking output properties are su-perior to that of the laser modelocked by an intracavity frequency-doubling crystal.
GROUND STATE ENERGY OF THE ELECTRON SUBBAND IN p-TYPE HgCdTe INVERSION LAYER
Authors: LIU KUN  , CHU JUN-HAO  , LI BIAO  , TANG DING-YUAN  ,   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

By using a modified self-consistent variation method, we have calculated the subband structures of n-type inversion layer in p-type HgCdTe NIS (metal-insulator-semiconductor) devices, obtained the ground subband energy E0 and its dependence on both the doping concentration in bulk HgCdTe and the surface electron concent-ration in the inversion layer. In the treament, the influence of non-parabolic band structure due to the interaction between the conduction band and the valence band, the Zener tunneling, the resonant states and the screening effect of the surface electric field have been considered. A simple and useful formula for calculating gro-and state energy E0 has been presented. The calculated results show good agreement with experimental data.
ELECTRON ENERGY DISTRIBUTIONS AND TRANSPORT COEFFICIENTS FOR MAGNETICALLY CONFINED GAS LASERS
Authors: LI JUN  , XU QIANG-HUA  , CHEN QING-MING  ,   华中理工大学激光技术国家重点实验室
Published: November 2020

The effects of magneticfield on electrons have been introduced into the normal Boltzmann transport equation for a novel laser system-the magnetically confined gas lasers. As an example the equation has been solved numerically for CO2 lasers. Curves are presented of electron energy distributions and transport coefficients under the influence of transverse magnetic field. Finally, an idea of improving gas laser-efficiency is proposed.
A STUDY OF RAMAN SCATTERING IN Ba-DOPED Bi-Sr-Cu-O SINGLE CRYSTALS
Authors: MAO ZHI-QIANG  , ZHANG HONG-GUANG  , TIAN MING-LIANG  , YU WEI-JIE  , TAN SHUN  , WANG YU  , XU CUN-YI  , ZHANG YU-HENG  ,   中国科学技术大学结构分析开放研究实验室
Published: November 2020

The phonon vibration characteristics of the Bi2Sr2-xBaxCuOy (x=0, 0.2，0.4) single crystal samples was studied by using Raman scattering measurement. The exp-erimental results show that in the Raman spectra of the Bi2Sr2-xBaxCuOy system the typical phonon vibrational modes mainly appear in the frequency range of 196, 282-310, 460, 625 and 660cm-1, and the intensities of the 196, 282-310, 625, and 660 cm-1 lines enhance with increasing Ba content x. In previous work, we have studied the influence of Ba-doping on the incommensurate modulation structure of the 2201 phase. On the basis of those results, in this article we analyze the relation of the incommensurate modulation structure and phonon vibration characteristics emphatically, thus point out that the intensifying of the superstructure modulation (i.e. the decr-ease of modulation period) changes the symmetry of the unit cell seriously so that the phonon Raman activity of the unit cell varies obviously.
CORRELATION OF STRUCTURE AND PROPERTIES IN Ba-DOPED Bi-2201 PHASE
Authors: MAO ZHI-QIANG  , JI MING-RONG  , TIAN MING-LIANG  , ZHU JING-SHENG  , ZHANG YU-HENG  ,   中国科学技术大学结构分析开放研究实验室
Published: November 2020

In this article, it is revealed that the Ba substitution intensifies the incommens-urate modulation of the Bi-2201 phase, namely the wavelengths of the modulation along b and c directions show obvious decrease. The study of superconductivity of the Ba-doped 2201 shows that the appropriate substitution of Ba for Sr (x≤0.2) can raise the Tc of 2201 phase, but as x exceeds 0.3, Tc decreases sharply, simult-aneously accompanied with the superconductor-insulator. transition In addition, the characteristic feature of electronic structure of the Ba-doped 2201 phase is also stu-died by use of the XPS and UPS spectra. Based on all these experimental resuits, the relation between incommensurate modulation structure, electronic structure and superconductivity for the Bi-2201 phase are discussed comprehensively, indicating that the replacement of Ba２＋ for Sr２＋ intensifies the mismatch between Bi-O layers and perovskite blocks. and the enhancement of this mismatch influences the symme-try of Cu-O2 planes seriously, just for this reason the variation of electronic state of Cu3d takes place (i.e. the degree of the coulomb correlation of the Cu3d electr-ons tends to be intensifled). In the process of Ba-doping, just due to the variation of Cu3d electrons, the 2201 phase undergoes a superconducting-insulating phase tran-sition.
A STUDY OF MAGNETOCALORIC EFFECT OF FERRITES
Authors: DU YOU-WET  , YE YING  , LU MU  , JIAO HONG-ZHEN  , JIN XIN  , CHEN WAN-RONG  ,   (1)南京大学固体物理研究所; (2)南京大学物理系; (3)南京师范大学物理系
Published: November 2020

The magnetocaloric effect of several ferrite specimens, with magnetoplumbite structure, spinel structure, garnet structure and perovskite structure respectirely, have been studied experimentally. The effect of substitution of non-magnetic ions on Cu-rie temperature and magnetic entropy are also reported.
INFRARED DIVERGENCE RESPONSE IN REORIENTATIONAL RELAXATION PROCESS OF Al3+-HOLE IN α QUARTZ
Authors: LIU YAN-ZHANG  , FAN XI-QING  ,   河南省基础和应用研究所,郑州大学物理系
Published: November 2020

The infrared divergence response theory is applied to reorientational relaxation process of Al3+-hole in α-quartz containing Al impurity to study the behaviour of low temperature dielectric relaxation loss properties in this system. Our calculation results showed that the single phononassisted tunneling process makes the main contribution to the dielectric loss for T10 K, the thermally activated relaxation process dominates the dielectric loss; as for 6.5 K < T<10 K, the dielectric loss is the superposition of the two relaxation process. It is pointed out that for the same relaxation unit, different relaxation process may have different infrared divergence response. The ultrasonic relaxation loss properties induced by the same relaxation unit is also discussed.
COMPARISON FOR THREE MODELS OF TERNARY FIS- SION AT FINITE TEMPERATURE
Authors: WU HE-YU  , DAI GUANG-XI  ,   中国科学院近代物理研究所,兰州730000
Published: November 2020

We define explicitly a fission path from u single sphere to partial overlapping up to separated spheres to describe three fragments with 120° (oblate), along a line (prolate), and to describe cascade with the first asysinetric fission and the second sysmetric fission. It is easy to compare the three modes for one deformation parameter. The barrieres are calculated by the temperature dependence of liquid drop model, adding the proximity potential to take into account the finite range effects of the nuclear force in a crevice, adding shell energy which is local shell effect interyra-ting all over the surface, and the fission probabilities are calculated, which lead to qualitative understanding for the best mode of ternary fission.
BALMERα ,β EMISSION IN COLLISION BETWEEN e- AND H2+
Authors: YANG FENG  , PAN GUANG-YAN  , LI DA-WAN  ,   (1)中国科学院物理研究所,北京100080; (2)中央民族学院物理系,北京100081
Published: November 2020

Experimental studies of collision between electron and H2+ ions producing excited atates have been performed by OMA using the crossing beam. The Balmer α,β emission spectra have been measured. The excitation cross sections have been calculated. And the dissociative recombination has been discussed qualitatively.
STUDIES ON THE ps GAIN-SWITCHING OF A SEMICONDUCTOR LASER
Authors: ZHOU FU-ZHENG  , MA GUO-BIN  , SHEN LI-QING  , ZHU QING-CHUN  , 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

A semiconductor laser is driven by a electrical circuit of gain switch, the variations of its pulse width and power vs bias current and driving pulse are studied. The optimal parameters are found. The shortest pulse width of this semiconductor laser is 26 ps. Also, using analytic?! model and numerical calculation, the experimental results are simulated successfully.
THE PROPAGATING SOLITARY WAVE SOLUTION IN SEMICONDUCTOR-DOPED GLASS OPTICAL FIBERS
Authors: CHEN LU-IUN  , LIANG CHANG-HONG  , WU HONG-SHI  ,   西安电子科技大学物理系,西安710071
Published: November 2020

The general propagating solitary wave solution in semiconductor-doped glass fibers, in which the nonlinearity is of saturation-type, is given. The properties of the solitary waves in various cases are discussed and the formation conditions of the bright and dark solitons are analzed.
INVESTIGATION OF THE ELECTRONIC STRUCTURE OF CLEAN Nb(100) SURFACE BY LMTO METHOD
Authors: LI YONG-PING  , ZHANG HAI-FENG  , PAN BI-CAI  ,   (1)中国科学技术大学材料科学系,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

In this paper the electronic densities of states(DOS) of Nb bulk, local densities of states (LDOS) of clean Nb(100) surface and surface energies relative to the bulk have been calculated by using LMTO method. The DOS of bulk Nb calculated in this paper is in agreement well with other method, the calculated surface energies support the result of low energy electron diffraction (LEED)dynamic calculation. Moreover, after analysing the LDOS, we suggest that there are surface states for the clean Nb(100) surface, which are above the Fermi, energy level.
A STUDY ON LASER-PREPARATION AND ENERGY- LEVEL STRUCTURE OF NANOMETER SIZED a-Si3N4 PARTICLES
Authors: WANG SHAN-ZHONG  , LI DAO-HUO  ,   (1)中国科学技术大学结构分析开放实验室,合肥230026; (2)中国科学院安徽光学精密机械研究所,合肥230031
Published: November 2020

In this paper, we give the principle and the empirical formulas of the preparation for nanometer sized a-Si3N4 particles by laser induced chemical vapor deposition (LICVD). Under certain technological parameters, our experiments have obtained high quality nanometer a-Si3N4 particles whose average diameter is 6.5nm. We disperse these particles in organic solvent so as to study its energy level structure with ultravolet-visible spectrum. The photoluminescent experiments show its peak-like spectrum structure and the splitting of energy band, which relate to super micro-particles. We also describe the picture of the physical structure of nanometer a-Si3N4 particles and demonstrate that silicon"wrong bond"≡Si-Si≡and silicon dangling bond≡Si30 play a dominant role in the spectrum character for Si-riched nanometer a-Si3N4 particle.
PHOTOLUMINESCENCE OF POROUS SILICON PROCESSED IN H2O2 UNDER ILLUMINATION
Authors: LIN JUN  , ZHANG LI-ZHU  , ZHANG BO-RUI  , ZONG BO-QING  , QIN GUO-GANG  , XU ZHEN-HUA  ,   (1)北京大学化学系,北京100871; (2)北京大学物理系,北京100871
Published: November 2020

The photoluminescence (PL) intensity of porous silicon in H2O2 under illtimina-tion increases first, and then decreases with increasing processing time, and the PL intensity reaches its maximum when the processing time is one minute. Under illumination in air, the PL degradation of porous silicon without processing is substa-ntia1, but that for the processed porous silicon gets much smaller. The Fourier-transform infrared (FTIR) absorption shows that the localized vibration related to oxygen increases greatly but all kinds of Si-H bonds decrease obviously. Contrasting the variation of the FTIR with that of the PL in the processes, we conclude that the luminescence does not come from the Si-H bonds on the surfaces of porous silicon.
AC CHARACTERISTICS OF A THIN Ag FILM PERCOLATION SYSTEM DEPOSITED ON A STATISTICAL FRACTAL SUBSTRATE
Authors: YE GAO-XIANG  , XU YU-QING  , WANG JIN-SONG  , ZHANG QI-XUI  ,   (1)杭州大学物理系,杭州310028; (2)浙江大学物理系,杭州310027
Published: November 2020

Ac characteristics of a thin Ag film percolation system deposited on a broken surface of α-Al2O3 ceramics are measured. We prove that the ac conductivity and ac dielectric constant obey the power law and the general scaling relation near the percolation threshold. The ac capacitance data as a function of the dc resistivity are obtained and its role is discussed.
RBS STUDY ON YBCO AMORPHOUS FILMS PREPARED BY D. C. MAGNETRON SPUTTERING
Authors: JIANG WEI-LIN  , WANG RUI-LAN  , ZHU FBI-RAN  , WANG CHANG-AN  , XU TIAN-BING  , LI HONG-CHENG  , ZHAI YONG-LIANG  , REN MENG-MEI  , ZHOU JUN-SI  ,   中国科学院物理研究所,北京100080
Published: November 2020

By using D. C. magnetron sputtering and selecting the total gas pressure 80 Pa, the deposition time 60 min and the target size 80, four amorphous YBCO/Al2O3 films were prepared with varying parameters, such as magnetic intensity, distance from the target to the substrate, and partial pressure ratio Ar/O2. The Ba and Cu concentrations relative to Y and the film thickness versus substrate position in the four samples were analyzed by Rutherford backscattering (RBS). Results have showed that the relative concentation of barium and copper were quite different at different positions and the film thickness were not uniform under disparate deposition conditions. However, one of the samples has an almost even profile in a region of 17mm around the center of the sample, where the film thickness is approximately equal to 0.13μm and the Y, Ba. Cu ratios are close to 1:2:3.
PHOTO-INDUCED STRUCTURAL CHANGE OF POLYDIACETYLENE CRYSTALS
Authors: PENG JING-CUI  ,   湖南大学应用物理系,长沙410082
Published: November 2020

Based on experimental data, the photo-induced structural change is interpreted as condensation of triple exciton polarons. The excitonic envelop functions for sin-glet and triplet state are calculated numerically. A possible mechanism of photo-induced structural change is presented and dicussed in detail.
DETERMINATION OF AlxGa1-xAs AUGER SENSITIVITY FACTORS
Authors: CHEN WEI-DE  , GUI YU-DE  ,   中国科学院半导体研究所和表面物理国家重点实验室,北京100083
Published: November 2020

AlxGa1-xAs Auger sensitivity factors have been determined by using PHI 610 scanning Auger microprobe with pure elemental standards Al, Ag and matrix GaAs. The quantitative results of AlxGa1-xAs measured by the present method are in very good agreement with that by X-ray double crystal measurement. It is shown that by using sensitivity factors obtained from the self-instrument, the accuracy of the quantitative AES analysis can be considerably improved compared with that using elemental relative sensitivity factors given by the PHI handbook or internal standard method.
A STUDY ON LASER CLADDING OF WC TiN SiC-Co HARD ALLOY AND THEIR STRENGTHENING MECHANISM
Authors: ZHANG SI-YU  , WANG BI-BEN  , ZHENG KE-QUAN  ,   兰州大学物理系,兰州730001
Published: November 2020

In this paper, the experimental procedures are presented for laser cladding WC-TiN-SiC-Co high hard alloy of the carbon steel surface using a CO2 laser with am output power of 2kW. We also give a comprehensive analysis about the phase structure, the phase morphology, the distribution profile of the hardness and the resistance to abrassion of the sample after treatment. The experimental results indicate-that the mechanical properties and the chemical composition in the surface layer of material will basically changed. Furthermore, a preliminary discussion of the strengthening mechanism of high hard alloy formed by laser cladding is alto given.
ENERGY SPECTRUM OF A q-DEFORMED HYDROGEN ATOM
Authors: YANG QING-ZHU  , XU BO-WEI  ,   (1)上海交通大学物理系; (2)上海师范大学物理系
Published: November 2020

The SOq(4) quantum algebra is used for the description of a q-deformed 3-dimensional hydrogen atom. The energy spectrum and degenercy of the q-deformed 3-dimension and 2-dimensional hydrogen atom are obtained respectively.
THEORY OF FWM TRANSMISSION AMPLIFICATION IN PLASMAS
Authors: MHNG YUE-DONG  , HUO YU-PING  , LI JIAN-GANG  , LUO JIA-RONG  ,   中国科学院等离子体物理研究所
Published: November 2020

The theory of FWM transmission amplification of ordinary wave mixing in magnetized plasma is investigated. The exact solutions are derived for the degenerate and nondegenerate cases and are adapted for EM wave mixing in unmagnetized plasma.
EFFECT OF GRAVITATIONAL RADIATION DAMPING ON THE VARIATION OF THE ORBITAL ELEMENTS OF BINARY SYSTEMS——THE EFFECT ON THE TIME OF PASSING PERIGEE OF BINARY STAR
Authors: LI LIN-SEN  ,   东北师范大学物理系
Published: November 2020

The effect of gravitational radiation damping on the variation of the orbital elements of binary system is studied further base on our previous work[1].The result and correction for the previous paper are presented. The effect of gravitational damping on the time of passing perigee of binary star is given. The result shows clearly that the gravitational damping results in both the periodic and secular variation of the time of passing perigee, that is, the time of passing perigee moves up in every revolution. The numerical estimation for the effect on the variation of the time of passing perigee of binary stars, Y Cyg, PSR 1913+16 and PSR 2303+24 been made.
THEORY OF MODE LOCKING WITH A NONLINEAR MIRROR
Authors: ZANG WEI-PING  , TIAN JIAN-GUO  , ZHANG GUANG-YIN  ,   南开大学物理系
Published: November 2020

This paper presents a closed-form analysis method of nonlinear mirror mode locking of a homogeneously broadened Laser. The pulse envelope we obtained is a hyperbolic secant function of time. We obtain the simple analytic expression for the pulse length and discuss the results.
INFLUENCE OF DIFFERENT COHERENT DOMAIN SIZES ASSOCIATED WITH SUBLATTICES ON XRD INTE-GRATED WIDTH AND INTEGRATED INTENSITY
Authors: HAO JIAN-MIN  , CHEN JI-ZHOU  , ZHANG SHI-MIN  ,   (1)天津电子工业部第四十六研究所; (2)天津理工学院材料中心
Published: November 2020

An expression of relation of X-ray diffraction integrated width and the different coherent domain sizes associated with sublattices is obtained. We conclude that the structural defect has no influence on the X-ray diffraction integrated intensity. A method for studying defect is suggested.
SURFACE AND INTERFACE OPTICAL-PHONON MODES IN A FOUR-LAYER HETEROSTRUCTURE
Authors: SHI JUN-JIE  , PAN SHAO-HUA  ,   (1)河南师范大学物理系; (2)中国科学院物理研究所,中国高等科学技术中心(世界实验室)
Published: November 2020

We have used the dielectric-continuum model to study the surface and interface optical-phonon modes in a four-layer heterostructure with finite thickness. The eige-nvectors, the dispersion relation and the interface charge densities are obtained. All the previous results for a dielectric slab, bilayer, trilayer and infinite four-layer he-terostructures can be reded-iced from our general relation for a finite four-layer he-terostructure. The dispersion relations and their numerical illustration for some inte-resting and practical structures such as a finite step-quantum-well are also given. This work can be regarded as a generalization of the formalism in reference [8].
EFFECTS OF THE HIGH DENSITY CHARGED DEFECT STATES AT THE CuPc/InP INTERFACE ON RAMAN SCATTERING OF CuPc LB FILM
Authors: KONG XIANG-GUI  , LIU YI-CHUN  , E SHU-LIN  ,   中国科学院长春物理研究所
Published: November 2020

The characteristics of current density-voltage (J一V) and capacitance-voltage of CuPc/InP rectifying heterojunction energy barrier is measured, and that the effects of density of states at CuPc/InP interface on Raman scattering of CuPc LB film are studied.
MECHANISM OF SUPERCONDUCTIVITY FOR Na-DOPED Bi2Sr2CaCu2O8+y
Authors: YU YANG  , JIN XIN  , SHEN TIAN-CANG  , YAO XI-XIAN  ,   南京大学物理系固体微结构国家重点实验室
Published: November 2020

We have prepared Na-doped Bi2Sr2CaCu2O8+y(x=0，0.4，0.5, 0.6, 0.7，0.8，1) samples by melting process. The transition temperature of the samples increased up to 90K, and maximum Tc0 achieved was 92.5K. During annealing in flowing oxygen at-mosphere, the Tc of the undoped sample degrade but in the Na-doped sample there is no dramatic Tc change, that indicates their Tc increase have different mechanism. So we believe Na substitution of Bi may destroy the charge balance of BiO layers, the electrons in CuO planes transfer to BiO layers thus create holes in Cu0 planes, the attraction between holes and electrons may be responsible for the superconductivity.
INVESTIGATION OF ONE-DIMENSIONAL NNN INTERACTION QUANTUN CHAIN BY CONFORMAL INVA-RIANCE AND THE LANCZOS METHOD
Authors: ZHANG HAI-YAN  , XU BO-WEI  ,   上海交通大学应用物理系
Published: November 2020

The energies of the ground state and the lowest-excited states of the one-dime-nsional NNN interaction quantum chain are calculated by using Lanczos method. The a no=nalous dimensions and normalizing constant are given from conformal field theory.
ATOMIC DIPOLE SQUEEZING IN OFF RESONANCE TWO-PHOTON JAYNES-CUMMINGS MODEL
Authors: ZHAN YOU-BANG  ,   淮阴师范专科学校物理系,中国高等科学技术中心(世界实验室)
Published: November 2020

In the present paper, considering the detuning and the initial atomic coherence, dipole squeezing in two-photon Jaynes-Cummings model is investigated by means of the time-evolution operator method. The influence of the frequency detuning on the dipole squeezing in interaction of field with atom and the relation between the mean photon number and the dipole squeezing are studied by numerical calculations.
STUDIES ON THE CHARACTERISTICS OF ALL-OPTICAL SWITCHING BASED ON THE EXCITED STATE ABSORPTION OF C60 MOLECULES
Authors: GUO FENG-YUN  , LI CHUN-FEI  , WANG RUI-BO  , YANG KUN  ,   哈尔滨工业大学应用物理系
Published: November 2020

We have obtained the characteristics of all-optical switching and modulation of C60 in toluene pumped by a pulsed Nd:YAG laser at λ=532.0nm and probed by a CW semiconductor laser at λ=747.0nm, based on nonlinear triplet-triplet absorption in C60. Dynamic processes of switching and modulation are simulated using rate equations, which coincide with the experimental results.
SOFT X-RAY LASER IN EXPANSION PLASMA PUMPING BY SHORT PULSED LASER
Authors: MA GUO-BIN  , TAN WEI-HAN  ,   (1)上海科学技术大学物理系,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; (2)中国科学院上海光学精密机械研究所
Published: November 2020

Using the analytical solutions of the hydrodynamic equations of plasma, energy level populations of the plasma dominated by He-like Mg ions are obtained by solving the rate equations numerically for short pulsed pumping laser. Variations of gain coefficient for MgXI ls3d-ls4f(λ=154?)vs time and spatial position are given. Also, the influence of the pumping laser pulse duration is discussed.
GROWTH OF PURE C60 SINGLE CRYSTALS FROM VAPOR PHASE
Authors: WANG GANG  , XIE SI-SHEN  , LIU WEI  , YU YU-DE  , ZHAO TIE-NAN  , LI NAN  , WANG CHANG-QING  , FU CHUN-SHENG  , ZHANG YOU-FENG  , QIAN SHENG-FA  , ZHANG ZE-BO  ,   (1)北京理工大学材料中心; (2)中国科学院物理研究所
Published: November 2020

Millimeter-sized C60 single crystals were grown by the vacuum sublimation of the purified C60 powder in a sealed vacuum quartz tube. C60 single crystals, up to size of 0.5mm×0.6mm×l.0mm and free from solvent or C70, had excellent faces. X-ray diffraction, electron diffraction and Raman spectra measurement were carried out to determine the room-temperature structure of C60 single crystals. The experimental results show that the temperature T1 of the hot end of tube, the temperature T2 of the cold end of tube and the temperature gradient ΔT= T2- T1 are the primary factors for preparation of large C60 single crystals. The above growth conditions were discussed in detail.
SITE-DIAGONAL DISORDER AND OFF-DIAGONAL DISO-RDER AMORPHOUS QUANTUM DOTS ON DIAMOND LATTICE
Authors: ZUO DU-LUO  , LI DAO-HUO  ,   中国科学院安徽光学精密机械研究所
Published: November 2020

The theoretical studies about site-diagonal disorder and off-diagonal disorder amorphous quantum. dots on diamond lattice are reported. We describe the electronic structures of the amorphous models by simple tight-binding Hamiltonian, solve the Ha-miltonian equation by recursion method, and study the localization behavior from the sensitivity of eigenvalues to a change in boundary conditions. It is found that if the band edges of amorphous quantum dots are consisted of extended states, the changing tendency of the band widths with size are similar to that of crystal quantum dots; if they are consisted of localized states, the band widths do not change with size when the size is greater than a critical one, but the densities of states at the band edges increase with size. The imaginary part of dielectric function ε2（?ω） of amorphous quantum dots is also studied. The ε2（?ω） corresponding to extended state is sensitive to the change of size. The ε2（?ω） corresponding to localized state has a small value and is insensitive to the change of size when the size is greater than localization length Lloc; when the size is close to or less than Lloc; there are no difierences between localized states and extended states, and ε2（?ω） increases quickly with the decrease of size.
GLASSY BEHAVIOR IN LEAD MAG-NESIUM NIOBATE RELAXORS
Authors: CHENG ZHONG-YANG  , YAO XI  , ZHANG LIANG-YING  ,   西安交通大学电子材料与器件研究室,西安710049
Published: November 2020

Evidence has been found that solid solution of 10 mol% lead titanate in lead magnesium niobate bears strong resemblance to spin and dipolar glasses. The frequency dispersion of the temperature of the permittivity maximum, Tm, has been analyzed using the Vogel-Fulcher relationship. The difference between the solid solution and glass was discussed. Based on this analysis, a new ralationship:ω = ω0exp {- (T0/Tm)p},was introduced which is more suitable and effective for relaxor ferroelectrics to analyze the frequency dispersion of the temperature of the permittivity maximum than Vogel-Fulcher relationship. The dielectric relation of the solid solution was measured The results were analyzed using the new relationship, and activation energy of 0.037 eV was obtaived.
STUDY ON RAMAN SPECTRA OF POLAR-PHONONS AND POLARITONS IN BaTiO3 AND Ce:BaTiO3 SINGLE CRYSTALS
Authors: ZENG LING-ZHI  , WANG RONG-PING  , JIANG YI-JIAN  , ZHU YONG  , LIU YU-LONG  ,   (1)北京工业大学应用物理系,北京100022; (2)中国科学院物理研究所,北京100080
Published: November 2020

In this paper, the Merten' s equation and dispersion relation of polaritons in the uniaxial crystal had been deduced from the generalized dispersion relation of the phonon-polariton. Raman spectra of every LO, TO mode and oblique phonons in BaTiO3 and Ce: BaTiO3 single crystals have been recorded, the directional dispersion curves are fitted on the basis of Merten's equation. Raman spectra of A1 polaritons with different wave-vector q have been measured and the high and low frequency dielectric constants in both BaTiO3 and Ce:BaTiO3 are calculated. Two broad asymmetry bands in A1(TO) Raman spectra and the mechanics of structure phase transition in BaTiO3 are also discussed. The influence of Ce on the structure of BaTiO3 single crystal are analysed.
PHENOMENOLOGICAL CALCULATIONS OF THE DEPENDENCES OF THE MAGNETORESISTANCE IN FM/NM MULTILAYERS ON THE THICKNESSES OF FM AND NM
Authors: WU JIAN-HUA  , LI BO-ZANG  , PU FU-CHO  ,   中国科学院物理研究所
Published: November 2020

Based on the phenomenological theory in which the mixed layer composed of the ferro magnetic and nonmagnetic materials is introduced in lieu of the interface, we calculate the dependences of the giant magnetoresistance (GMR) in Fe/Cr multilayers on the thicknesses of ferromagnetic (FM) layers and non-magnetic (NM) layers. Good agreement of the calculated resutls with experimental ones is found. The two-variable function of the GMR respect to the thicknesses of FM and NM is plotted.
INVESTIGATION OF THE PLASMA-POLYMERIZED THIOPHENE FILM AND THE DOPING EFFECT WITH I+ IMPLANTATION
Authors: TONG ZHI-SHEN  , WU MEI-ZHEN  , ZHANG ZHENG-YANG  , PU TIAN-SHU  , JIN RUO-PENG  , ZHANG JING  , ZHU FU-YING  , CAO DE-XIN  , CAO JIAN-QING  , ZHU DE-ZHANG  ,   (1)中国纺织大学基础部,上海200051; (2)中国科学院上海原子核研究所,上海201800
Published: November 2020

Plasma-Polymerized organic film starting from thiophene has been prepared. The elemental composition of pristine film was determined by elastic recoil detection (ERD) and Rutherford backscattering spectrum (RBS). FT-IR technique has been used to characterize the sample film. From the near-IR to UV reflectance and transmittance data, we calculated the optical constants of the film, N(ω) = n + ik ,by using the transfer matrix method. In view of the calculations, we investigated the optical properties of the pristine in detail. Moreover, the doping effect in the plasma-polymerized thiophene film with 24 keV I+ implantation has been also explored. The result shows that the transport process of charge carrier in bombarded layer can be interpreted by Mott's VRH model.