The anomalous 0.5 and 0.7 conductance plateaus in quantum point contacts

被引：72

作者：

Bruus, H ^{[1
]}

Cheianov, VV ^{[1
]}

Flensberg, K ^{[1
]}

机构：

[1] Niels Bohr Inst, Orsted Lab, DK-2100 Copenhagen O, Denmark

来源：

PHYSICA E | 2001年 / 10卷 / 1-3期

关键词：

quantum point contacts; anomalous conductance; 0.5; plateau; 0.7;

D O I：

10.1016/S1386-9477(01)00061-3

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The anomalous 0.5 and 0.7 conductance plateaus in quantum point contacts in zero magnetic field are analyzed within a phenomenological model. The model utilizes the Landauer-Buttiker formalism and involves enhanced spin correlations and thermal depopulation of spin subbands. In particular we can account for the plateau values 0.5 and 0.7, as well as the unusual temperature and magnetic field dependences of the 0.7 plateau. Finally, the model predicts the possibility of coexisting 0.5 and 0.7 plateaus. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：97 / 102

页数：6

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