Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

First-principles studies for magnetism in Cu-doped GaN

First-principles studies for magnetism in Cu-doped GaN Hole carrier mediated magnetization in Cu-doped GaN is investigated by using the first-principles calculations. By studying the sp-d interaction and the direct exchange interaction among the dopants, we obtain an equation to determine the spontaneous magnetization as a function of the Cu dopant concentration and the hole carrier density. It is demonstrated that nonmagnetic Cu doped GaN can be of room-temperature ferromagnetism. The system’s Curie temperature T c can reach about 345 K with Cu concentration of 1.0% and hole carrier density of 5.0×10 19 cm −3 . The results are in good agreement with experimental observations and indicate that ferromagnetism in this systems is tunable by controlling the Cu concentration and the hole carrier density. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Wuhan University Journal of Natural Sciences Springer Journals

First-principles studies for magnetism in Cu-doped GaN

Loading next page...
 
/lp/springer-journals/first-principles-studies-for-magnetism-in-cu-doped-gan-VK0xHd1jGh

References (25)

Publisher
Springer Journals
Copyright
Copyright © 2011 by Wuhan University and Springer-Verlag Berlin Heidelberg
Subject
Mathematics; Computer Science, general; Mathematics, general; Life Sciences, general ; Physics, general
ISSN
1007-1202
eISSN
1993-4998
DOI
10.1007/s11859-011-0744-9
Publisher site
See Article on Publisher Site

Abstract

Hole carrier mediated magnetization in Cu-doped GaN is investigated by using the first-principles calculations. By studying the sp-d interaction and the direct exchange interaction among the dopants, we obtain an equation to determine the spontaneous magnetization as a function of the Cu dopant concentration and the hole carrier density. It is demonstrated that nonmagnetic Cu doped GaN can be of room-temperature ferromagnetism. The system’s Curie temperature T c can reach about 345 K with Cu concentration of 1.0% and hole carrier density of 5.0×10 19 cm −3 . The results are in good agreement with experimental observations and indicate that ferromagnetism in this systems is tunable by controlling the Cu concentration and the hole carrier density.

Journal

Wuhan University Journal of Natural SciencesSpringer Journals

Published: Jun 1, 2011

There are no references for this article.