大学物理系论文一维半金属的能态性质研究论文.doc

一维半金属的能态性质研究 摘要本课题就一维情况下半金属的能态性质进行研究。半金属是性质介于金属和 非金属之间的物质。首先，在微扰的作用下，周期场小运动的电子的能级就形成能 带。半金属的能带交叠比较少，所以其既具有金属性质又具有半导体性质。进而运 用能带理论，求出在一定温度下半金屈的能态密度。通过能态密度，求出普金屈的费米能级。根据费米能级求出半金属的电子热容量和电导率址在他温度下，分析能态密度对半金属的电子热容量和电导性质的影响。关键词 半金属;能态密度；费米能级贰电子热容量；电尊率one-dimensional semi-metallicband is relativelenergy-conductivity in the semi-metallic.electrons in the cycleABSTRACT The propertieselectrnonmetal. Firstly, the ee enertes is studied for the case of thetallic is the material between the metal andon causes energy levels of the movingergy band. As the overlap of the semi-metallic,its nature has both metal and semiconductor natures. And then theobtain the energy density for the semi-metallic at a certain nergy level of the semi-metal is calculated by use of the densityccording to the Fermi energy level, the heat capacity and conductivity of theare computed for the semi-metallic? At a certain temperature, the affect of thedensity o ergy states is analyzed for the properties of the electronic heat capacity and 用能带理论，求出在一定温度下半金屈的能态密度。通过能态密度，求出普金屈的 费米能级。根据费米能级求出半金属的电子热容量和电导率址在他温度下，分析 能态密度对半金属的电子热容量和电导性质的影响。 关键词 半金属;能态密度；费米能级贰电子热容量；电尊率 one-dimensional semi-metallic band is relativel energy- conductivity in the semi-metallic. electrons in the cycle ABSTRACT The properties electr nonmetal. Firstly, the e e ener tes is studied for the case of the tallic is the material between the metal and on causes energy levels of the moving ergy band. As the overlap of the semi-metallic ,its nature has both metal and semiconductor natures. And then the obtain the energy density for the semi-metallic at a certain nergy level of the semi-metal is calculated by use of the density ccording to the Fermi energy level, the heat capacity and conductivity of the are computed for the semi-metallic? At a certain temperature, the affect of the density o ergy states is analyzed for the properties of the electronic heat capacity and KEY WORDS Semi-metallic; Density of the energy state; Fermi energy level; Electro