Influence of Fermi velocity engineering on electronic and optical properties of graphene superlattices

被引：3
作者：
Aram, Tahereh Nemati [1 ,2 ]
Asgari, Asghar [1 ,3 ]
机构：
[1] Univ Tabriz, Res Inst Appl Phys & Astron, Tabriz, Iran
[2] Univ Grenoble Alpes, Inst Neel, F-38042 Grenoble, France
[3] Univ Western Australia, Sch Elect Elect & Comp Engn, Crawley, WA 6009, Australia
来源：
PHYSICS LETTERS A | 2015年 / 379卷 / 12-13期
关键词：
Graphene; Fermi velocity; Electronic and optical properties of graphene superlattices; MASSLESS DIRAC FERMIONS; GAP;
D O I：
10.1016/j.physleta.2015.01.019
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In this paper, using Kronig-Penney model, the electronic states in graphene-based superlattices with various substrates and considering exact electron Fermi velocity values are investigated. The analysis of our results clearly indicates that the difference between Fermi velocity values of gaped and gapless graphene regions determines the patency rate of band gap. Also, using transfer matrix method (TMM) the absorbance spectrum of mentioned structures is calculated. The more important result is that the absorbance of these structures is significantly near zero. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：974 / 978
页数：5
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