Energy Gaps at Neutrality Point in Bilayer Graphene in a Magnetic Field

被引：20

作者：

Gorbar, E. V. ^{[1
]}

Gusynin, V. P. ^{[1
]}

Miransky, V. A. ^{[2
]}

机构：

[1] Bogolyubov Inst Theoret Phys, UA-03680 Kiev, Ukraine

[2] Univ Western Ontario, Dept Appl Math, London, ON N6A 5B7, Canada

来源：

JETP LETTERS | 2010年 / 91卷 / 06期

基金：

瑞士国家科学基金会; 加拿大自然科学与工程研究理事会;

关键词：

JETP Letter; Polarization Function; Quantum Hall Effect; Monolayer Graphene; Bilayer Graphene;

D O I：

10.1134/S0021364010060111

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Utilizing the Baym-Kadanoff formalism with the polarization function calculated in the random phase approximation, the dynamics of the nu=0 quantum Hall state in bilayer graphene is analyzed. Two phases with nonzero energy gap, the ferromagnetic and layer asymmetric ones, are found. The phase diagram in the plane ((Delta) over tilde (0), B), where (Delta) over tilde (0) is a top-bottom gates voltage imbalance, is described. It is shown that the energy gap scales linearly, Delta E similar to 14B [T] K, with magnetic field.

引用

页码：314 / 318

页数：5

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