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Effects of the alloy compositions on the phonon-polaritons in ternary mixed crystals

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Optoelectronics Letters 2008年第4期4卷 302-306页

作者： BAO Jin liang xi-xia Departement of Physics Inner Mongolia University Hohhot 010021 China

Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, Gaxin1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.

关键词：三元混合晶体声子极化声子成分研究

Thermodynamic Properties of Linear Protein Solutions:an Application to Type Ⅰ Antifreeze Protein Solutions

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Chemical Research in Chinese Universities 2012年第6期28卷 1070-1073页

作者： LI Li-fen liang xi-xia LI Qian-zhong Department of Physics lnner Mongolia University Hohhot 010021 P. R. China Department of Basic Curriculum North China Institute of Science and Technology Beijing 101601 P. R. China

A statistical thermodynamic theory of linear protein solutions was proposed with the aid of a lattice model and applied to type Ⅰ antifreeze protein（AFPI） *** numerical results for several AFPI solutions show that the Gibbs function of the solution has a minimum at a certain protein concentration,but the protein chemical potential increases with increasing the *** influences of temperature and protein chain length on the AFPI chemical potential were also *** evaluation for the colligative depression of the freezing point confirms that the antifreeze action should be recognized as *** theoretical deduction for the concentration dependence of the thermal hysteresis activity coincides qualitatively with the previous experimental and theoretical results.

关键词： Antifreeze protein solution Gibbs function Chemical potential Thermal hysteresis

Surface exciton-polaritons in ternary mixed crystals

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Optoelectronics Letters 2007年第6期3卷 466-469页

作者： LIU LI liang xi-xia BAO Jin Department of Physics Inner Mongolia University Hohhot 010021 China

The surface exciton-polaritons in ternary mixed crystals are investigated. The numerical calculations for several Ⅲ-V and II-VI compound systems are performed and the polariton frequencies as functions of the wave-vector and the compositions for ternary mixed crystals AlxGaI_xAS, *** and *** as examples are given and discussed. The results show that the dependence of the energies of surface polaritons on the composition of ternary mixed crystals are slightly nonlinear different from the bulk modes.

关键词：极化激子表面性质极性

Binding energy of donors in symmetric triangular quantum wells

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Optoelectronics Letters 2005年第2期1卷 88-91页

作者： ZHANG Ji-ye liang xi-xia Department of Physics College of Sciences and Technology Inner Mongolia University Hohhot 010021 China

Hydrogen-like donor impurity states in symmetric triangular quantum wells are investigated by using a variational *** the effects of the variable effective mass of electrons and the spatially dependent dielectric constant are considered in the *** numerical results show that the binding energy depends on not only the effective mass and dielectric constant but also the spatial distribution of electron probability *** binding energies of donor states get the maximums at the *** results are also compared with those obtained in parabolic and square *** is seen that the triangular well support the highest binding energies for donor states.

关键词：半导体技术晶体取向附生对称性概率密度

Temperature dependence of excitonic transition in ZnSe/ZnCdSe quantum wells

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Optoelectronics Letters 2005年第3期1卷 164-167页

作者： GUO Zi-zheng liang xi-xia BAN Shi-liang Department of Physics Inner Mongolia University Hohhot 010021 P. R. China Department of Physics Inner Mongolia Normal University Hohhot 010022 P. R. Chine

A theoretical calculation for the temperature dependence of the excitonic transition in ZnSe/ZnOdSe quantum wells is performed. The exciton binding energy is calculated with a variational technique by considering the temperature-dependence parameters. Our results show that the exciton binding energy reduces linearly with temperature increasing. We find that the strain due to lattice mismatch and differential thermal expansion decreases with the temperature increasing.

关键词：半导体技术温度控制激光器件激子转换

Mechanical and Magnetic Properties of Rh and RhH： First-Principles Calculations

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Chinese Physics Letters 2010年第2期27卷 239-242页

作者：崔鑫王建涛梁希侠赵国忠 School of Physical Science and Technology Inner Mongolia University Hohhot 010021 Institute of Physics Chinese Academy of Sciences Beijing 100190 Department of Physics Capital Normal University Beijing 100037

Mechanical and magnetic properties of Rh in bcc, fcc structures and RhH in cubic structure are investigated by using first-principles calculations. Theoretical strengths of these structures are given for the first time. The results show that the NaCl-type cubic RhH has a lower bulk modulus and a theoretical strength larger than those of Rh in bcc and fcc structures. A strong magneto-volume effect of a transition from low magnetic moment-low cell volume＇＇ to high magnetic moment-large cell volume＇＇ is also found for both the bcc and fcc Rh structures as well as RhH.

关键词： Condensed matter: electrical magnetic and optical Condensed matter: structural mechanical & thermal

Efficient OpenMP Based Z-curve Encoding and Decoding Algorithms

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Computers, Materials & Continua 2025年第1期82卷 1313-1327页

作者： Zicheng Zhou Shaowen Sun Teng liang Mengjuan Li Fengling xia School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu611731China Faculty of Information Engineering and Automation Kunming University of Science and TechnologyKunming650500China School of Communications Information Engineering Yunnan Communications Vocational and Technical CollegeKunming650500China Library Yunnan Normal UniversityKunming650500China Faculty of Civil Aviation and Aeronautics Kunming University of Science and TechnologyKunming650500China

Z-curve’s encoding and decoding algorithms are primely important in many Z-curve-based *** bit interleaving algorithm is the current state-of-the-art algorithm for encoding and decoding *** simple,its efficiency is hindered by the step-by-step coordinate shifting and bitwise *** tackle this problem,we first propose the efficient encoding algorithm LTFe and the corresponding decoding algorithm LTFd,which adopt two optimization methods to boost the algorithm’s efficiency:1)we design efficient lookup tables(LT)that convert encoding and decoding operations into table-lookup operations;2)we design a bit detection mechanism that skips partial order of a coordinate or a Z-value with consecutive 0s in the front,avoiding unnecessary iterative *** propose order-parallel and point-parallel OpenMP-based algorithms to exploit the modern multi-core *** results on discrete,skewed,and real datasets indicate that our point-parallel algorithms can be up to 12.6×faster than the existing algorithms.

关键词： Z-curve lookup table OpenMP bit detection mechanism

二维声学极化子的基态能量和有效质量(英文)

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发光学报 2008年第4期29卷 670-674页

作者：侯俊华梁希侠内蒙古大学物理系

自陷电子对了解光电材料的光学性质非常重要。近些年来,形变晶格中电子自陷的问题受到研究人员的广泛关注。电子既与声学模耦合,也与光学模相互作用,但电子由自由态向自陷态的转变缘于近程的电子-声学声子耦合。研究表明:声学极化子在... 详细信息

自陷电子对了解光电材料的光学性质非常重要。近些年来,形变晶格中电子自陷的问题受到研究人员的广泛关注。电子既与声学模耦合,也与光学模相互作用,但电子由自由态向自陷态的转变缘于近程的电子-声学声子耦合。研究表明:声学极化子在大多数半导体以及Ⅲ-Ⅴ族化合物,甚至碱卤化物中都不可能自陷。另一方面,电子-声子耦合在束缚结构,如二维、一维系统中,会有所增强。换言之,电子在低维结构中更容易自陷。Farias等人指出:声学极化子在二维系统中自陷的临界电子-声子耦合常数为定值,不随声子截止波矢的变化而改变。这种结论在物理上不尽合理。通过计算二维系统中的声学极化子基态能量和有效质量,讨论了二维声学极化子自陷问题。研究发现,二维声学极化子自陷转变的临界耦合常数随声子截止波矢的增加朝电子-声子耦合较弱的方向变化。这一特征与前人关于体和表面极化子研究获得的结论定性一致。所得二维声学极化子基态能量的表达式与Farias等人一致,但自陷的结果与Farias等人的结果在定性和定量上均有不同,我们认为Farias等人关于二维声学极化子自陷转变点的确定方式有不妥之处。通过改进自陷转变点的确定方式,得到了在物理上更合理的结果。

关键词：声学极化子基态能量有效质量自陷

Binding energy of donors in symmetric triangular quantum wells

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Optoelectronics Letters 2005年第2期 12-15页

作者： ZHANG Ji-ye and liang xi-xia- Department of Physics,College of Sciences and Technology,Inner Mongolia University,Hohhot 010021,China

关键词： well Binding energy of donors in symmetric triangular quantum wells GaAs