• 文献标题:   Charge 2e Skyrmions in Bilayer Graphene
  • 文献类型:   Article
  • 作  者:   ABANIN DA, PARAMESWARAN SA, SONDHI SL
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW LETTERS
  • ISSN:   0031-9007
  • 通讯作者地址:   Princeton Univ
  • 被引频次:   28
  • DOI:   10.1103/PhysRevLett.103.076802
  • 出版年:   2009

▎ 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.