SCALING IN INTERACTION-ASSISTED COHERENT TRANSPORT

被引:75
作者
FRAHM, K
MULLERGROELING, A
PICHARD, JL
WEINMANN, D
机构
[1] CEA/DSM/DRECAM/Service de Physique de I’Etat Condensé, Gif-sur-Yvette Cedex
来源
EUROPHYSICS LETTERS | 1995年 / 31卷 / 03期
关键词
D O I
10.1209/0295-5075/31/3/008
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The pair localization length L(2) of two interacting electrons in one-dimensional disordered systems is studied numerically. Using two direct approaches, we find L(2) alpha L(1)(a)lpha, where L(1), is the one-electron localization length and alpha approximate to 1.65. This demonstrates the enhancement effect proposed by Shepelyansky, but the value of alpha differs from previous estimates (alpha = 2) in the disorder range considered. We explain this discrepancy using a scaling picture recently introduced by Imry and taking into account a more accurate distribution than previously assumed for the overlap of one-electron wave functions.
引用
收藏
页码:169 / 174
页数:6
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