Paramagnetic ion-doped nanocrystal as a voltage-controlled spin filter

被引：100

作者：

Efros, AL

Rashba, EI ^{[1
]}

Rosen, M

机构：

[1] USN, Res Lab, Nanostruct Opt Sect, Washington, DC 20375 USA

[2] MIT, Dept Phys, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 20期

关键词：

D O I：

10.1103/PhysRevLett.87.206601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A theory of spin injection from a ferromagnetic source into a semiconductor through a paramagnetic ion-doped nanocrystal is developed. Spin-polarized current from the source polarizes the ion; the polarized ion, in turn, controls the spin polarization of the current flowing through the nanocrystal. Depending on voltage, the ion can either enhance the injection coefficient by several times or suppress it. Large ion spins produce stronger enhancement of spin injection.

引用

收藏

页码：206601 / 1

页数：4

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