Gapped Bilayer Graphene: A Tunable Strongly Correlated Band Insulator

被引：13

作者：

Cheianov, V. V. ^{[1
]}

Aleiner, I. L. ^{[1
,2
]}

Fal'ko, V. I. ^{[1
]}

机构：

[1] Univ Lancaster, Dept Phys, Lancaster LA1 4YB, England

[2] Columbia Univ, Dept Phys, New York, NY 10027 USA

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 109卷 / 10期

基金：

英国工程与自然科学研究理事会; 欧洲研究理事会;

关键词：

CRYSTALS;

D O I：

10.1103/PhysRevLett.109.106801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We introduce the notion of the strongly correlated band insulator (SCI), where the lowest energy excitations are collective modes (excitons) rather than the single particles. We construct controllable 1/N expansion for SCI to describe their observable properties. A remarkable example of the SCI is bilayer graphene which is shown to be tunable between the SCI and usual weak coupling regime.

引用

页数：5

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