Size-dependent spintronic properties of dilute magnetic semiconductor nanocrystals

被引：102

作者：

Huang, XY ^{[1
]}

Makmal, A

Chelikowsky, JR

Kronik, L

机构：

[1] Univ Minnesota, Dept Chem Engn & Mat Sci, Inst Theory Adv Mat Informat Technol, Digital Technol Ctr, Minneapolis, MN 55455 USA

[2] Weizmann Inst Sci, Dept Mat & Interfaces, IL-76100 Rehovot, Israel

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.94.236801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The electronic structure and magnetic properties of Mn-doped Ge, GaAs, and ZnSe nanocrystals are investigated using real space ab initio pseudopotentials constructed within the local spin-density approximation. The ferromagnetic and half-metallicity trends found in the bulk are preserved in the nanocrystals. However, the Mn-related impurity states become much deeper in energy with decreasing nanocrystalline size, causing the ferromagnetic stabilization to be dominated by double exchange via localized holes rather than by a Zener-like mechanism.

引用

页数：4

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