Charge 2e Skyrmions in Bilayer Graphene

被引：30

作者：

Abanin, D. A. ^{[1
,2
,3
]}

Parameswaran, S. A. ^{[2
]}

Sondhi, S. L. ^{[2
]}

机构：

[1] Princeton Univ, Princeton Ctr Theoret Sci, Princeton, NJ 08544 USA

[2] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA

[3] Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 07期

基金：

美国国家科学基金会;

关键词：

BERRYS PHASE; QUANTUM; GAS;

D O I：

10.1103/PhysRevLett.103.076802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Quantum Hall states that result from interaction induced lifting of the eightfold degeneracy of the zeroth Landau level in bilayer graphene are considered. We show that at even filling factors electric charge is injected into the system in the form of charge 2e Skyrmions. This is a rare example of binding of charges in a system with purely repulsive interactions. We calculate the Skyrmion energy and size as a function of the effective Zeeman interaction and discuss the signatures of the charge 2e Skyrmions in the scanning probe experiments.

引用

页数：4

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