Affiliation of Author(s):理学院
Journal:PHYSICA B-CONDENSED MATTER
Key Words:Diluted magnetic semiconductor delta-(Zn,Cr)S Enhancement of ferromagnetism Shape deformation Double exchange
Abstract:With density functional calculations, the enhancement of magnetic exchange energy (MEE) of two-dimensional (2-d) diluted magnetic semiconductor (DMS) delta-(Zn,Cr)S with shape deformation was investigated. The increase of lattice parameter c (perpendicular to the Cr layer) and decrease of a (parallel to the Cr layer) had a significant effect on the increase of MEE. Both PBE and LDA + U methods could enhance the MEE to a significant extent, which makes it superior to other delta-DMS found in initial research. The main mechanism by which increase the MEE is to vary the hole-states across the Fermi level with shape deformation, based on Zener's double exchange (DE) mechanism. This enriches the research into 2-d FM materials, which are candidates for next-generation electronic and optoelectronic applications.
ISSN No.:0921-4526
Translation or Not:no
Date of Publication:2018-09-15
Co-author:李小影,pyf,Jinbin Li,wangzhangshan,Shi Daning,魏心源,张开成,马春兰
Correspondence Author:朱岩,潘燕飞,Zhu Yan