Ferromagnetism mediated by few electrons in a semimagnetic quantum dot -: art. no. 117201

被引：87

作者：

Fernández-Rossier, J ^{[1
]}

Brey, L

机构：

[1] Univ Alicante, Dept Fis Aplicada, San Vicente Del Raspieg, Spain

[2] CSIC, Inst Ciencia Mat Madrid, E-28049 Madrid, Spain

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.93.117201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A (II,Mn)VI diluted magnetic semiconductor quantum dot with an integer number of electrons controlled with a gate voltage is considered. We show that a single electron is able to induce a collective spontaneous magnetization of the Mn spins, overcoming the short range antiferromagnetic interactions, at a temperature order of 1 K, 2 orders of magnitude above the ordering temperature in bulk. The magnetic behavior of the dot depends dramatically on the parity of the number of electrons in the dot.

引用

页码：117201 / 1

页数：4

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