Spin-dependent electron behaviour in quantum point contacts

被引：14

作者：

Bychkov, AM ^{[1
]}

Yakimenko, II

Berggren, KF

机构：

[1] Linkoping Univ, Dept Phys & Measurement Technol, S-58183 Linkoping, Sweden

[2] Tech Univ Moscow, Moscow State Engn Phys Inst, Moscow 115409, Russia

来源：

NANOTECHNOLOGY | 2000年 / 11卷 / 04期

关键词：

D O I：

10.1088/0957-4484/11/4/325

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effect of spontaneous spin polarization in quantum point contacts (QPCs) is investigated by self-consistent modelling within the Kohn-Sham local spin-density formalism. The existence of the spin-polarized state of the QPC channel in the low-density regime is shown to change the value and the shape of the effective potential barrier for up- and down-spin electrons. We suggest that this effect can be relevant to the explanation of the anomalous 0.7-structure in the QPC conductance and may assist spin injection in potential spintronic devices.

引用

页码：318 / 322

页数：5

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