Coulomb interaction and semimetal-insulator transition in graphene

被引：9

作者：

Li, Wei ^{[1
]}

Liu, Guo-Zhu ^{[1
]}

机构：

[1] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China

来源：

PHYSICS LETTERS A | 2010年 / 374卷 / 29期

基金：

美国国家科学基金会;

关键词：

Massless Dirac fermion; Semimetal-insulator transition; Non-Fermi liquid behavior; SUPERCONDUCTIVITY; VIOLATION; BEHAVIOR;

D O I：

10.1016/j.physleta.2010.05.011

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The strong Coulomb interaction between massless Dirac fermions can drive a semimetal-insulator transition in single-layer graphene by dynamically generating an excitonic fermion gap. There is a critical interaction strength lambda(c). that separates the semimetal phase from the insulator phase. We calculate the specific heat and susceptibility of the system and show that they exhibit distinct behaviors in the semimetal and insulator phases. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：2957 / 2963

页数：7

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