• 文献标题:   Electron heating and mechanical properties of graphene
  • 文献类型:   Article
  • 作  者:   SILVAGUILLEN JA, GUINEA F
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW B
  • ISSN:   2469-9950 EI 2469-9969
  • 通讯作者地址:   Wuhan Univ
  • 被引频次:   0
  • DOI:   10.1103/PhysRevB.101.060102
  • 出版年:   2020

▎ 摘  要

The heating of electrons in graphene by laser irradiation, and its effects on the lattice structure, are studied. Values for the temperature of the electron system in realistic situations are obtained. For sufficiently high electron temperatures, the occupancy of the states in the sigma band of graphene is modified. The strength of the carbon-carbon bonds changes, leading to the emergence of strains, and to buckling in suspended samples. While most applications of "strain engineering" in two-dimensional materials focus on the effects of strains on electronic properties, the effect studied here leads to alterations of the structure induced by light. This optomechanical coupling can induce deflections in the order of similar to 50 nm in micron-sized samples.