Using single quantum states as spin filters to study spin polarization in ferromagnets

被引：77

作者：

Deshmukh, MM ^{[1
]}

Ralph, DC ^{[1
]}

机构：

[1] Cornell Univ, Atom & Solid State Phys Lab, Ithaca, NY 14853 USA

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 26期

关键词：

D O I：

10.1103/PhysRevLett.89.266803

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

By measuring electron tunneling between a ferromagnet and individual energy levels in an aluminum quantum dot, we show how spin-resolved quantum states can be used as filters to determine spin-dependent tunneling rates. We also observe magnetic-field-dependent shifts in the magnet's electrochemical potential relative to the dot's energy levels. The shifts vary between samples and are generally smaller than expected from the magnet's spin-polarized density of states. We suggest that they are affected by field-dependent charge redistribution at the magnetic interface.

引用

页数：4

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