线度和材料对双层柱状纳米系统中电流的影响  

Influence of Radius and Material on the Electric Current in the Bilayer Columnar Nanometer System

作　　者：邓于[1] 吴强[1] 

机构地区：[1]重庆文理学院物理与信息工程系,重庆永川402160

出　　处：《西南大学学报（自然科学版）》2008年第9期37-42,共6页Journal of Southwest University(Natural Science Edition)

基　　金：重庆市教育委员会教育教学研究资助项目(0633132);重庆文理学院重点科研资助项目(Z2006WX18)

摘　　要：建立了在交变电场作用下双层柱状纳米系统电子满足的方程;在弛豫时间近似下,计算了系统中的电流密度;以外层(或内层)为Al、内层(或外层)为另一种金属的两层圆柱状纳米系统为例,探讨了材料和线度对电流的影响.结果表明:外层中某一点的电流密度随量子导线外半径和离轴距离增大而增大;给定线度条件下,电流密度不仅决定于内核和外壳的材料本身,还决定于两种材料的配置.An equation of the electronic athletics is built for the bilayer columnar nanometer system in the alternate transformation electric field, and the current density is calculated under an approximate relaxation time in the system. With the bilayer columnar nanometer system as an example, the influence of material and radius on electric current is ex another metal inner layer （or outer layer p ） ored under the conditions of A1 outer layer （or inner layer） and The results show that the electric current density in the outer layer increases with outer radius and off-axis distance in the quantum wire. For a given radius, electric current density relies not only on the materials of the outer layer and inner layer, but on the collocation of the two materials as well.

关 键 词：双层柱状纳米系统 电流 材料 线度 

分 类 号：O469[理学—凝聚态物理]