一维极化子的定域振动模

本文研究了一维电子-晶格耦合系统中极化子的晶格振动,发现了两个新的定域振动模g₆和g′₆,它们分别在一定的耦合参量λ的范围内存在。本文还给出了各个定域振动模的频率和位形随λ的变化情况。 关键词：     

EFFECTS OF THE HUBBARD INTERACTIONS AND ELECTROSTATIC PINNING ON THE 2D LOCALIZED MODES OF TRANS-(CH)x AROUND A SOLITON

The electron-lattice coupling vibrational modes are calculated using a two-dimensional ex-tension of the Su-Schrieffet-Heeger model that includes the bond-bending term, the electron-electron interactions and the electrostatic pianing for doped samples, The result shows that all ten localized modes exist after turning on the e-e interactions and doped pinning effects, but their localizations has been strengthened and the frequencies have been moved slightly.     

EFFECTS OF THE HUBBARD INTERACTIONS AND ELECTROSTATIC PINNING ON THE 2D LOCALIZED MODES OF TRANS-(CH)x AROUND A SOLITON

The electron-lattice coupling vibrational modes are calculated using a two-dimensional ex-tension of the Su-Schrieffet-Heeger model that includes the bond-bending term, the electron-electron interactions and the electrostatic pianing for doped samples, The result shows that all ten localized modes exist after turning on the e-e interactions and doped pinning effects, but their localizations has been strengthened and the frequencies have been moved slightly.     

装备保障体系建模与仿真关键技术研究

为解决装甲装备体系保障能力生成的关键技术难题,针对现有需求和装备保障体系仿真中心建设的实际情况,以装甲机械化部队为主要研究对象,论文主要研究内容包括：描述了装备保障体系概念,构建了装备保障体系结构框架;总结了适合装备保障体系的建模与仿真方法,采用分层建模、基于多Agent和基于UML的体系建模方法,建立了装备保障体系模型,并对模型进行了仿真;借鉴霍尔三维结构,建立了装备保障体系评估对象维、评估指标维和评估目标维,进行装备保障体系效能评估。通过研究,初步明确了装备保障体系的内涵,明确了适合装备保障体系的建模与仿真方法,具备一定的实用性和可操作性,能够为进一步推进装备保障体制改革、完善综合保障体系、创新保障模式、增强综合保障能力提供有力的理论支撑。     

聚乙炔极化子的新电子束缚态

本文用自洽迭代的方法研究了SSH模型中极化子的电子能谱。结果发现,除了禁带中两个在TLM模型中存在的深能级电子束缚态外,还存在四个浅能级的电子束缚态。它们形成分立的能级,并分别位于导带的顶部和底部以及价带的顶部和底部。价带顶和导带底的两个束缚态只在一定的耦合参量λ范围内出现。 关键词：     

聚乙炔孤子的二维局域振动模及其键弯曲势的影响

本文考虑了反式聚乙炔的平面结构,在二维空间内研究了孤子的局域振动模,并在此基础上讨论了键弯曲势对孤子局域模的影响,结果发现:1)晶格在垂链方向的振幅与链向的可比拟;2)当耦合参数λ取定值时,产生新的局域模(与SSH模型比较),且局域模的数目随着键弯曲势参数K的增加而增多,其局域性也随之增强。 关键词：