原子尺寸点接触中的电子输运性质  

Transport Properties of Electrons in an Atom-sized Point Contact

作　　者：戴振宏[1] 余亚宾[1] 孙金祚[1] 

机构地区：[1]烟台大学物理系,264005

出　　处：《固体电子学研究与进展》1997年第4期340-346,共7页Research & Progress of SSE

摘　　要：用二维－准－维－二维（2D－准1D－2D）模型，描述扫描隧道显微镜（STM）探头刺入金属单晶体表面再回拉而形成的探头与金属间的点接触，研究其电子输运性质。利用传输矩阵方法求解薛定谔方程，得出了以2e2／h为单位的鼻子化电导。对电导随收缩区的收缩量和延伸量的变化规律进行了研究。Two dimensional-quasi one dimensional-two dimensional model is used to describe the point contact between a scanning tunneling microscope (STM)tip and a metal crystal. The point contact is formed by indenting the tip into a metal surface and then withdrawing. Its electron transport properties are studied.By means of the transfer matrix method, the schrodinger equation is solved. And quantization of the conductance in unit of 2e2/h is obtained. The variational regularities of the conductance with constricting and stretching of the constriction region are studied.

关 键 词：STM 量子点接触 半导体量子理论 电子输运 

分 类 号：O471.1[理学—半导体物理]