量子盒的弹道电导  

Ballistic Electronic Conductance of a Box

作　　者：施耀铭[1] 许士跃[1] 陈杭德[1] 

机构地区：[1]上海大学理学院物理系

出　　处：《上海大学学报（自然科学版）》1998年第1期21-26,共6页Journal of Shanghai University:Natural Science Edition

基　　金：上海市高校科技发展基金

摘　　要：应用量子力学波函数阻抗匹配方法，作者研究了准一维无相互作用电子气通过量子盒的弹道传播．在通过量子盒时，电子除受到盒边界的弹性散射外是自由的．作者计算了量子盒电导作为盒长度和宽度的函数．计算结果表明，当长度较短时，电导显示带有规则脉冲振荡的确定的量子化台阶；随着长度的增加，电导曲线逐渐趋于无规振荡的图样．By using quantum mechanical wave impedance matching, we study the ballistic propagation of a quasionedimensional noninteractingelectron gas through quantum box, in which the electrons are free except for their interaction with the boundaries. The ballistic conductance of a box is calculated as a function of its width and length. When the length is shorter, the conductance showes certain quantized step with some regular pulse oscillations. However, as the length is increasing, it becomes as the pattern of a random oscillations.

关 键 词：弹道电导 量子盒 量子化电导 量子点 

分 类 号：O413.2[理学—理论物理]