Topological Phases in the Zeroth Landau Level of Bilayer Graphene

被引：43

作者：

Papic, Z. ^{[1
,2
,3
]}

Abanin, D. A. ^{[2
,3
]}

机构：

[1] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA

[2] Perimeter Inst Theoret Phys, Waterloo, ON N2L 2Y5, Canada

[3] Inst Quantum Comp, Waterloo, ON N2L 3G1, Canada

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 112卷 / 04期

关键词：

INCOMPRESSIBLE QUANTUM FLUID; TWO-DIMENSIONAL ELECTRONS; MAGNETIC-FIELD; HALL; NEUTRALITY; STATES;

D O I：

10.1103/PhysRevLett.112.046602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We analyze the phase diagram of the zeroth Landau level of bilayer graphene, taking into account the realistic effects of screening of the Coulomb interaction and strong mixing between two degenerate sublevels. We identify robust quantum Hall states at filling factors nu = -1, -4/3, -5/3, -8/5, -1/2 and discuss the nature of their ground states, collective excitations, and relation to the more familiar states in GaAs using a tractable model. In particular, we present evidence that the nu = -1/2 state is non-Abelian and described by either the Moore-Read wave function or its particle-hole conjugate, while ruling out other candidates such as the 331 state.

引用

页数：5

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