标题：
Long range ferromagnetism in (Zn, Mn, Li)Se with competition between double exchange and p-d exchange
点击次数：
所属单位：
理学院
发表刊物：
PHYSICS LETTERS A
关键字：
DMS (Zn, Mn, Li)Se Double exchange p-d exchange Long range ferromagnetism DFT
摘要：
In this paper, we elucidate the mechanism for Li co-dopant induced enhancement of the ferromagnetism in 2 x 2 x 2 and 3 x 3 x 3 cubic (Zn, Mn)Se using density functional calculations. The doping atoms tend to congregate together according to the ferromagnetic (FM) energy. All configurations are strongly FM ones due to double exchange (DE) and p-d exchange (PE). DE and PE are shown in the partial density of states. The hole is uniformly distributed in the cubic (Zn, Mn, Li)Se, and it is the one and only parameter to decide the exchange energy, when impurity atoms stay further away from each other. The average exchange energy of these configurations is considered to be a function of the square root of the hole concentration. The fitting data to a polynomial function shows that DE and PE have roles of similar importance in the exchange energy. (C) 2017 Elsevier B.V. All rights reserved.
ISSN号：
0375-9601
是否译文：
否
发表时间：
2017-04-04
合写作者：
柳涛,张晓燕,潘燕飞,Wei, X. Y.,Ma, C. L.,施大宁,樊济宇
通讯作者：
朱岩,樊济宇,朱岩
发表时间：
2017-04-04
学位：理学博士学位
职称：副教授
所在单位：理学院