不均匀垂直磁场中偏压AA堆积双层石墨中的朗道能谱  

Landau spectrum of biased AA-stacked bilayer graphite in a nonuniform magnetic field

作　　者：刘瑾[1] 王大理[1] 

机构地区：[1]安徽师范大学物理与电子信息学院,安徽芜湖241000

出　　处：《大学物理》2014年第12期4-6,14,共4页College Physics

基　　金：国家自然科学基金项目(11047019);安徽省自然科学基金项目(1408085MA15)资助

摘　　要：本文从量子力学的基本概念出发,在对称规范变换下,借助特殊函数方程理论,研究了不均匀磁场和垂直电场联合作用下AA堆积双层石墨的朗道能级结构.结果表明该体系中的朗道能级是高度简并的,特别是在狄拉克点处,而且该体系中偶然简并的零能朗道能级能够被垂直电场有效地调控.Based on the elementary concepts of quantum mechanics, the combined effects of a nonuniform magnetic field and a vertical electric field on the Landau levels in AA-stacked bilayer graphite are investigated within the symmetric gauge by means of special function theory. The results show that the Landau levels in this system are high degenerate quantization, especially at the Dirac points. Furthermore, the accidental degeneracy of zero-energy states can be effectively modulated by the interlayer bias voltage.

关 键 词：AA堆积双层石墨 不均匀磁场 垂直电场 朗道能级 

分 类 号：O413.1[理学—理论物理]