Electron heating and mechanical properties of graphene

Article

关键词: CARRIER MULTIPLICATION;    PSEUDOPOTENTIALS;    GENERATION;    METALS;    ENERGY;   

DOI  :  10.1103/PhysRevB.101.060102

来源: SCIE

【 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.

【 授权许可】

Free