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HIGH-ENERGY PROTON IRradiation EFFECTS ON GaAs/Ge SPACE SOLAR CELLS

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Acta Metallurgica Sinica(English Letters) 2001年第6期14卷 463-466页

作者： R. Wang (The Key Laboratory of Beam Technology and Materials Modification of Ministry of Education, Institute of Low Energy Nuclear physics, Beijing Normal University Beijing radiation center, Beijing 100875, China) S.D. Yao (Department of Technical Phys Inst. of Energy Nucl. Phys. Beijing Normal Univ. Beijing 100875 China

This paper reports the high-energy proton irradiation effects on GaAs/Ge space solar cells. The solar cells were irradiated by protons with energy of 5-20 MeV at fluence ranging from 1×109 to 7×1013.cm-2, and then their electric parameters were measured at AM0. It was shown that the Isc, Voc and Pmax decrease as the proton energy increasing, and the degradation is relative to proton irradiation-induced defect with a level of Ec-0.41 eV in irradiated GaAs/Ge cells.

关键词： Germanium High energy physics Irradiation Protons Semiconducting gallium arsenide

Enhancement of magnetism of Zn0.95Co0.05O films by p-type Cu+ doping

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Progress in Natural Science:Materials International 2011年第1期21卷 31-35页

作者： Wei-chang HAO~(1,5),Jian-jun LI~2,Huai-zhe XU~3.Jia-ou WANG~4,Tian-min WANG~1 1.center of Materials physics and Chemistry,Beihang University,Beijing 100083.China 2.Department of Materials Science and Engineering, Anhui University of Science and Technology,Huainan 23.001,China 3.Department of physics,Beihang University,Beijing 100083.China 4.Beijing Synchrotron {3. Facility,Institute of High Energy physics, Chinese Academy of Sciences,100049,China 5.Key Laboratory of Micro-nano Measurement,Manipulation and physics, Ministry of Education,Beihang University,Beijing 100191,China [a] center of Materials physics and Chemistry Beihang University Beijing 100083 China [b] Department of Materials Science and Engineering Anhui University of Science and Technology Huainan 232001 China [c] Department of physics Beihang University Beijing 100083 China [d] Beijing Synchrotron radiation Facility Institute of High Energy Physics Chinese Academy of Sciences 100049 China [e] Key Laboratory of Micro-nano Measurement Manipulation and Physics Ministry of Education Beihang University Beijing 100191 China

Zn0.95Co0.05O and Zn0.91Co0.05Cu0.04O thin films were fabricated on Si（111） substrate by the reactive magnetron sputtering method at different O-Ar *** characterizations by X-ray diffractometry（XRD）,X-ray photo-electronic spectrum（XPS）, and electron paramagnetic resonance（EPR） indicate that the doped Cu ions substitute the Zn2+ions in the ZnO *** doped Cu ions are in Cu+and Cu2+mixture valence *** ferromagnetism of the Zn0.91Co0.05Cu0.04O film increases gradually the increasing Cu+ions *** results indicate that the increase of ferromagnetism is not owing to the magnetic contribution of Cu+ions themselves,but owing to the enhancement of magnetic interaction between Co ions,which suggests that p-type doping of Cu+ions plays an important role in mediating the ferromagnetic coupling between Co ions.

关键词： Zn0.95Co0.05O films Zn0.91Co0.05Cu0.04O films magnetic semiconductors magnetic coupling co-doping

Mechanisms of the pancake vortex and vortex line movement in the high T_c superconductors Bi_2Sr_2CaCu_2O_8+δ and La_(1.93.Sr0.0_7CuO_4+δ

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Science China(physics,Mechanics & Astronomy) 2007年第2期50卷 240-248页

作者： WANG WeiXian1,ZHOU Fang2,TAN Shun1,WU Huan1 & ZHANG YuHeng1 1 National High Magnetic Field Laboratory,University of Science and Technology of China,Hefei 23.026,China 2 National Laboratory for Superconductivity,lnstitute of physics and the center for condensed Matter physics,Chinese Academy of Sciences,Beijing 100080,China 1. National High Magnetic Field Laboratory University of Science and Technology of China Hefei 230026 China 2. National Laboratory for Superconductivity Institute of Physics and the Center for Condensed Matter Physics Chinese Academy of Sciences Beijing 100080 China

In the strict sense, it is not very clear why with magnetic field increasing, the normal-superconductive (NS) transition becomes broad for Bi2Sr2CaCu208+δ(Bi2212) while the NS transitions are almost parallel for La193.roo7Cu04+δ(La214). In this paper, R-T relations are measured by the six-probe method. We propose a moving mechanism of the pancake vortex and vortex line for Bi2212. The theoretical curves fit the experiment data well.

关键词： superconductivity superconductive pancake vortex dynamics

量子动边界广义含时谐振子之精确的指数-正弦型演化态

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物理学报 2001年第9期50卷 1654-1660页

作者：李伯臧李玲中国科学院物理研究所和凝聚态物理中心山西大学物理系和理论物理研究所太原030006

研究了被局限于区间 [0 ,L(t) ]中运动的动边界广义含时谐振子量子系统 ,其Hamiltonian为坐标与动量的非齐次含时二次型 .求出了具有“指数正弦型”演化态的充要条件以及相应的正交归一完备的精确演化态系列 .此结果不但几乎包含了已... 详细信息

研究了被局限于区间 [0 ,L(t) ]中运动的动边界广义含时谐振子量子系统 ,其Hamiltonian为坐标与动量的非齐次含时二次型 .求出了具有“指数正弦型”演化态的充要条件以及相应的正交归一完备的精确演化态系列 .此结果不但几乎包含了已有结果作为特例 ,还涵盖了相当广泛的范围 .此外 ,澄清了个别作者关于对时间的微商的一个误解 ,指出对时空坐标的微商均具有寻常的含义 .

关键词：动边界量子系统广义含时谐振子精确解量子力学微商动边界广义含时谐振子量子系统指数-正弦型演化态

A new way of transformation from a-quartz to coesite

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Progress in Natural Science:Materials International 2006年第10期16卷 1090-1097页

作者： SU Wenhui, LIU Shue, XU Dapeng, WANG Weiran, YAO Bin, GUO Xingyuan, LIU Zhiguo, and ZHONG Zheng ( center for the condensed Matter Science and Technology, Harbin Institute of Technology, Harbin 150001, China center for Rare-Earth Solid State {3., Jilin University, Changchun 13.023. China International center for Materials {3., Chinese A-cademy of Sciences, Shenyang 110015, China center for condensed Matter and radiation {3., China center of Advanced Science and Technology (World Laboratory), Beijing 100080, China Department of {3., University of Windsor, Windsor, ON N9B 3.4, Canada) center for Rare-Earth Solid State physics Jilin University Changchun 130023 China International center for Materials physics Chinese Academy of Sciences Shenyang 110015 China center for condensed Matter and radiation {3. China Center of Advanced Science and Technology (World Laboratory) Beijing 100080 China center for the condensed Matter Science and Technology Harbin Institute of Technology Harbin 150001 China Department of physics University of Windsor Windsor ON N9B 3P4 Canada

A laboratory method combining the high-energy mechanical ball milling and high static pressure has been suggested for modelling synthesis of coesite in the Earth's crust. A window of milling time, a mechanical collision-induced intermediate phase ofα-quartz and its condition of easily crystallizing into coesite under the condition of 3.0 GPa, 923.K, < 1.0 min have been discovered. The new method needs much shorter synthesizing time and lower synthesizing critical pressure than those used before. The Raman spectra for the coesite synthesized by the present method have covered all the information of those natural and synthesized coesites reported before. It is demonstrated that this method has a great potential in geo-science research and implied the other possible mechanism of coesite formation in the Earth's crust.

关键词： quartz-coesite high-energy mechanical ball milling high state pressure Raman spectrum metastable phase sub-duction-exhumation of plate.

Multiparty quantum secret sharing of classical and quantum messages

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Progress in Natural Science:Materials International 2007年第1期17卷 26-31页

作者： CHEN Pan, DENG Fuguo and LONG Guilu ( Key Laboratory for Quantum Information and Measurements, and Department of physics, Tsinghua University, Beijing 100084, China Key Laboratory of Beam Technology and Material Modification, MOE, Institute of Low Energy Nuclear physics, and Department of Material Science and Engineering, Beijing Normal University, Beijing 100875, China Beijing radiation {3., Beijing 100875, China Key Laboratory for Atomic and Molecular Nano-Sciences, Tsinghua University, Beijing 100084, China) [a]Key Laboratory for Quantum Information and Measurements and Department of Physics Tsinghua University Beijing China [b]Key Laboratory of Beam Technology and Material Modification MOE Institute of Low Energy Nuclear Physics and Department of Material Science and Engineering Beijing Normal University Beijing China [c]Beijing radiation center Beijing China [d]Key Laboratory for Atomic and Molecular Nano-Sciences Tsinghua University Beijing China

A scheme for multiparty quantum secret sharing of classical and quantum messages is proposed by using entanglement swapping. This scheme can distribute not only the classical information but also the quantum informati... 详细信息

关键词： quantum secret sharing classical message quantum message EPR pair.

Photocatalytic properties of BiOX(X=Cl,Br,and I)

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Rare Metals 2008年第3期27卷 243-250页

作者： AN Huizhong DU Yi WANG Tianmin WANG Cong HAO Weichang ZHANG Junying center of condensed Matter and Materials physics School of Science Beihang University Beijing 100083 China

A novel series of photocatalysts, bismuth oxyhalide （BiOX, X = Cl, Br, and Ⅰ）, were synthesized by a hydrolysis method. The powder sampies were characterized by the use of X-ray diffraction （XRD）, scanning electron microscope, and UV-Vis spectrophotometer. The XRD pattern showed that all the BiOX were well crystallized in the tetragonal structure. The band gaps of the sheet-shaped compounds BiOX （X = Cl, Br, andⅠ） were 3.44, 2.76, and 1.85 eV, respectively. BiOBr showed the highest photocatalytic activity in degrading rhodamine B （RhB） and evolving 02 for its proper valence band （VB）. BiOI has no photocatalytic activity. BiOCl showed the highest activity in decomposing isopropanol because of electron-hole pair separation through trapping electrons by oxygen vacancies.

关键词： photocatalysis rhodamine B isopropanol O2 evolution BiOCl BiOBr BiOI

Phase transition and chemical decomposition of liquid carbon dioxide and nitrogen mixture under extreme conditions

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Chinese physics B 2016年第2期25卷 312-319页

作者：姜晓旭陈冠宇李玉同程新路唐翠明 Institution of Atomic and Molecular physics Sichuan University Beijing National Laboratory for condensed Matter physics Institute of Physics Chinese Academy of Sciences Technology Development center Central Semiconductor Manufacturing Corporation Department of physics and Mathematics Sichuan University of Science and Engineering

Thermodynamic and chemical properties of liquid carbon dioxide and nitrogen（CO_（2~–）N_2） mixture under the conditions of extremely high densities and temperatures are studied by using quantum molecular dynamic（QMD） simulations based on density functional theory including dispersion corrections（DFT-D）. We present equilibrium properties of liquid mixture for 112 separate density and temperature points, by selecting densities ranging from ρ = 1.80 g/cm^3.to 3.40 g/cm^3.and temperatures from T = 500 K to 8000 K. In the range of our study, the liquid CO_（2~–）N_2 mixture undergoes a continuous transition from molecular to atomic fluid state and liquid polymerization inferred from pair correlation functions（PCFs）and the distribution of various molecular components. The insulator–metal transition is demonstrated by means of the electronic density of states（DOS）.

关键词： liquid CO2-N2 mixture quantum molecular dynamic (QMD) simulations DFT-D phase transi- tion

随机表面散射光场的格林函数法与基尔霍夫近似的比较

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物理学报 2004年第2期53卷 427-435页

作者：刘春香程传福任晓荣刘曼滕树云徐至展中国科学院物理研究所和凝聚态物理中心光物理实验室北京100080 中国科学院上海光学与精密机械研究所上海201800 山东师范大学物理系济南250014

从简谐光波满足的亥姆霍兹方程出发 ,将由格林定理得到的介质分界面上的积分方程转化为以表面上的光波及其导数为未知量的线性方程组 ,并对其进行数值求解 ,实现了光场的数值计算 .同时 ,由透射光场的格林函数积分得出了基尔霍夫近似下... 详细信息

从简谐光波满足的亥姆霍兹方程出发 ,将由格林定理得到的介质分界面上的积分方程转化为以表面上的光波及其导数为未知量的线性方程组 ,并对其进行数值求解 ,实现了光场的数值计算 .同时 ,由透射光场的格林函数积分得出了基尔霍夫近似下光场的表达式 .通过类比推导夫琅和费面上散斑场自相关函数的方法 ,提出了产生随机表面及其导数的傅里叶变换方法 .在此基础上 ,对采用基尔霍夫近似进行自仿射分形随机表面的散射光场数值计算的精确程度进行了研究 .发现在随机表面粗糙度比较小时 ,基尔霍夫近似的精度比较高 ;在粗糙度相同的情况下 ,表面的分形维数越小 ,基尔霍夫近似的精度越高 .

关键词：随机表面散射光场格林函数积分基尔霍夫近似简谐光波亥姆霍兹方程透射光场夫琅和费面自相关函数傅里叶变换