• 文献标题:   Anomalous Thermoelectric Transport of Dirac Particles in Graphene
  • 文献类型:   Article
  • 作  者:   WEI P, BAO WZ, PU Y, LAU CN, SHI J
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW LETTERS
  • ISSN:   0031-9007
  • 通讯作者地址:   Univ Calif Riverside
  • 被引频次:   275
  • DOI:   10.1103/PhysRevLett.102.166808
  • 出版年:   2009

▎ 摘  要

We report a thermoelectric study of graphene in both zero and applied magnetic fields. As a direct consequence of the linear dispersion of massless particles, we find that the Seebeck coefficient S-xx diverges with 1/root|n(2D)|, where n(2D) is the carrier density. We observe a very large Nernst signal S-xy (similar to 50 mu V/K at 8 T) at the Dirac point, and an oscillatory dependence of both S-xx and S-xy on n(2D) at low temperatures. Our results underscore the anomalous thermoelectric transport in graphene, which may be used as a highly sensitive probe for impurity bands near the Dirac point.