准一维量子线中电子的传导性  

ELECTRONIC CONDUCTIVITY IN QUASI-ONE-DIMENSIONAL QUANTUM WIRE

作　　者：尹俊雄[1] 熊刚[1] 

机构地区：[1]北京师范大学物理学系,北京100875

出　　处：《北京师范大学学报（自然科学版）》2011年第1期23-26,共4页Journal of Beijing Normal University(Natural Science)

基　　金：国家自然科学基金资助项目(10604006)

摘　　要：一条理想的量子线同一条无序量子线耦合在一起,理想链中能量为E的电子波函数,能被无序链中某些格点能量Vn,2在电子能量E附近的格点强烈散射.在Vn,2=E格点,能量为E的电子波函数能发生全反射,也就是"反共振效应".在无序度W较大时,随着W的增大,无序链中能够强烈影响周期链的格点数减少,这使得周期链中电子的局域长度增大,与数值计算结果一致.When ideal quantum wire and disordered quantum wire are conjugated,electron wave function with energy E in ideal chain,can be strongly scattered,by grid points with energy Vn,2 in the vicinity of E,in disordered chain.Electron wave with eigen-energy E is totally reflected at site n,1 when Vn,2=E,resulting in anti-resonance effect.Because the range of Vn,2 is greater than above-mentioned range for case of large W value,number of sites with Vn,2=E decreases in disordered chain,and electron localization length increases with increasing W.This agrees well with numerical results.

关 键 词：局域长度 无序度 链间耦合 电子能量 随机能量中心 

分 类 号：O471.1[理学—半导体物理]