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  • 文献标题:   Fermi velocity enhancement in monolayer and bilayer graphene
  • 文献类型:   Article, Proceedings Paper
  • 作　　者:   BORGHI G, POLINI M, ASGARI R, MACDONALD AH
  • 作者关键词:   graphene, electronic structure
  • 出版物名称:   SOLID STATE COMMUNICATIONS
  • ISSN:   0038-1098
  • 通讯作者地址:   CNR
  • 被引频次:   55
  • DOI:   10.1016/j.ssc.2009.02.053
  • 出版年:   2009

▎ 摘　　要

In single-layer graphene sheets non-local interband exchange leads to a renormalized Fermi-surface effective mass which vanishes in the low carrier-density limit. We report on a comparative study of Fermi surface effective mass renormalization in single-layer and AB-stacked bilayer graphene. We explain why the mass does not approach zero in the bilayer case, although its value is still strongly suppressed. (C) 2009 Elsevier Ltd. All rights reserved.