• 文献标题:   Thermoelectricity in graphene: Effects of a gap and magnetic fields
  • 文献类型:   Article
  • 作  者:   PATEL AA, MUKERJEE S
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW B
  • ISSN:   1098-0121
  • 通讯作者地址:   Indian Inst Technol
  • 被引频次:   9
  • DOI:   10.1103/PhysRevB.86.075411
  • 出版年:   2012

▎ 摘  要

We calculate the thermopower of monolayer graphene in various circumstances. We consider acoustic phonon scattering which might be the operative scattering mechanism in freestanding films and predict that the thermopower will be linear in any induced gap in the system. Further, the thermopower peaks at the same value of chemical potential (tunable by gate voltage) independent of the gap. We show that in the semiclassical approximation, the thermopower in a magnetic field saturates at high field to a value which can be calculated exactly and is independent of the details of the scattering. This effect might be observable experimentally. We also note that a Yukawa scattering potential can be used to fit experimental data for the thermopower for reasonable values of the screening length parameter.