Finite size effects of the surface states in a lattice model of topological insulator

被引：15
|
作者：
Ebihara, Kazuto [1 ]
Yada, Keiji [1 ]
Yamakage, Ai [1 ]
Tanaka, Yukio [1 ]
机构：
[1] Nagoya Univ, Dept Appl Phys, Nagoya, Aichi 4648603, Japan
来源：
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2012年 / 44卷 / 05期
关键词：
SINGLE DIRAC CONE; TRANSPORT; BI2SE3;
D O I：
10.1016/j.physe.2011.12.008
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Energy gap and wave function in thin films of topological insulator is studied, based on tight-binding model. It is revealed that thickness dependence of the magnitude of energy gap is composed of damping and oscillation. The damped behavior originates from the presence of gapless surface Dirac cone in the infinite thickness limit. On the other hand, the oscillatory behavior stems from electronic properties in the thin thickness limit. Crown Copyright (C) 2011 Published by Elsevier B.V. All rights reserved.
引用
收藏
页码：885 / 890
页数：6
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