Fermi velocity enhancement in monolayer and bilayer graphene

被引：60

作者：

Borghi, Giovanni ^{[3
]}

Polini, Marco ^{[1
,2
]}

Asgari, Reza ^{[4
]}

MacDonald, A. H. ^{[5
]}

机构：

[1] CNR, INFM, NEST, I-56126 Pisa, Italy

[2] Scuola Normale Super Pisa, I-56126 Pisa, Italy

[3] SISSA, I-34014 Trieste, Italy

[4] IPM, Inst Res Fundamental Sci, Sch Phys, Tehran 193955531, Iran

[5] Univ Texas Austin, Dept Phys, Austin, TX 78703 USA

来源：

SOLID STATE COMMUNICATIONS | 2009年 / 149卷 / 27-28期

基金：

美国国家科学基金会;

关键词：

Graphene; Electronic structure;

D O I：

10.1016/j.ssc.2009.02.053

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

In single-layer graphene sheets non-local interband exchange leads to a renormalized Fermi-surface effective mass which vanishes in the low carrier-density limit. We report on a comparative study of Fermi surface effective mass renormalization in single-layer and AB-stacked bilayer graphene. We explain why the mass does not approach zero in the bilayer case, although its value is still strongly suppressed. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1117 / 1122

页数：6

共 29 条

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