周口师范学院学报
週口師範學院學報
주구사범학원학보
Journal of Zhoukou Normal University
2015年
2期
49~52
,共null页
张云丽 杨建国 朱自强 周小东 巫洪章 谭明秋
張雲麗 楊建國 硃自彊 週小東 巫洪章 譚明鞦
장운려 양건국 주자강 주소동 무홍장 담명추
稀磁半导体 第一性原理 电子结构 磁性质
稀磁半導體 第一性原理 電子結構 磁性質
희자반도체 제일성원리 전자결구 자성질
diluted magnetic semiconductor; first-principle calculations; electronic structure; magnetic properties
稀磁半导体因兼有半导体及金属共同特性,在电子器件和磁性方面有着广泛应用.因此,无论从理论还是应用上研究稀磁半导体都具有重要意义.本文基于第一性原理计算研究了Mn掺杂GaAs稀磁半导体的稳定结构、磁序特点、磁性来源及电子结构.首先,计算研究了GaAs的电子结构,证实其半导体特点;其次,研究发现了铁磁（FM）构型为Mn掺杂的GaAs体系的最稳定构型,并且基于该稳定构型进一步研究发现Mn掺杂GaAs的磁性主要来源于Mn原子;最后,研究发现Mn掺杂GaAs体系的电子结构具有稀磁半导体特性,并基于此展望了Mn掺杂GaAs稀磁半导体的应用前景.
稀磁半導體因兼有半導體及金屬共同特性,在電子器件和磁性方麵有著廣汎應用.因此,無論從理論還是應用上研究稀磁半導體都具有重要意義.本文基于第一性原理計算研究瞭Mn摻雜GaAs稀磁半導體的穩定結構、磁序特點、磁性來源及電子結構.首先,計算研究瞭GaAs的電子結構,證實其半導體特點;其次,研究髮現瞭鐵磁（FM）構型為Mn摻雜的GaAs體繫的最穩定構型,併且基于該穩定構型進一步研究髮現Mn摻雜GaAs的磁性主要來源于Mn原子;最後,研究髮現Mn摻雜GaAs體繫的電子結構具有稀磁半導體特性,併基于此展望瞭Mn摻雜GaAs稀磁半導體的應用前景.
희자반도체인겸유반도체급금속공동특성,재전자기건화자성방면유착엄범응용.인차,무론종이론환시응용상연구희자반도체도구유중요의의.본문기우제일성원리계산연구료Mn참잡GaAs희자반도체적은정결구、자서특점、자성래원급전자결구.수선,계산연구료GaAs적전자결구,증실기반도체특점;기차,연구발현료철자（FM）구형위Mn참잡적GaAs체계적최은정구형,병차기우해은정구형진일보연구발현Mn참잡GaAs적자성주요래원우Mn원자;최후,연구발현Mn참잡GaAs체계적전자결구구유희자반도체특성,병기우차전망료Mn참잡GaAs희자반도체적응용전경.
Diluted magnetic semiconductor has a wide range of applications in the electronics and magnetism for its both semiconductor and metal common characteristics,therefore,it is meaningful to study about diluted magnetic semiconductor in both theory and application research.The stable construction,magnetic order,the origination of magnetism and electronic structures of Mn doped GaAs were studied by using first principles calculation.Firstly,the electronic structure of GaAs is studied,it is proved to be semiconductor;Secondly,it is found that the FM configuration is the most stable for Mn doped GaAs system,and the magnetic moment mainly comes from Mn atom;Finally,the electronic structures of Mn doped GaAs is studied,and it is found that Ga1- xMnxAs is diluted magnetic semiconductor and its application prospects is forecasted.
