The conductance of a multi-mode ballistic ring: Beyond Landauer and Kubo

被引：6
|
作者：
Bandopadhyay, S. [1 ]
Etzioni, Y. [1 ]
Cohen, D. [1 ]
机构：
[1] Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel
来源：
EUROPHYSICS LETTERS | 2006年 / 76卷 / 05期
关键词：
D O I：
10.1209/epl/i2006-10360-9
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The Landauer conductance of a two-terminal device equals to the number of open modes in the weak scattering limit. What is the corresponding result if we close the system into a ring? Is it still bounded by the number of open modes? Or is it unbounded as in the serni-classical (Drude) analysis? It turns out that the calculation of the mesoscopic conductance is similar to solving a percolation problem. The "percolation" is in energy space rather than in real space. The non-universal structures and the sparsity of the perturbation matrix cannot be ignored.
引用
收藏
页码：739 / 745
页数：7
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