Effect of electric-field on spin transport and spin current in an organic semiconductor system

被引：17

作者：

Mi, Yilin ^{[1
,2
]}

Zhang, Ming ^{[1
]}

Yan, Hui ^{[1
]}

机构：

[1] Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100022, Peoples R China

[2] N China Univ Technol, Coll Sci, Beijing 100041, Peoples R China

来源：

PHYSICS LETTERS A | 2008年 / 372卷 / 42期

关键词：

Spin-dependent conductivity; Spin accumulation; Current spin polarization;

D O I：

10.1016/j.physleta.2008.08.040

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We use the two-component drift-diffusion model to study the spin density polarization in an organic semiconductor system under an external electric-field. The spin-dependent electrical-conductivity, the drift spin current and the diffusion spin current in the organic semiconductor are self-consistently derived. It is found that the spin current could be strongly influenced by the spin-dependent electrical-conductivity. When the spin-dependent conductivity varies from 0 to 0.5%, the spin current presents a very pronounced change almost three orders in magnitude. The electric-field could effectively enhance the spin-dependent electrical-conductivity and the spin current. Furthermore, the spin-dependent electrical-conductivity is position sensitive, but its position sensitivity goes down while electric-field is larger than about 1 mV/mu m. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：6434 / 6437

页数：4

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