Slowing hot-carrier relaxation in graphene using a magnetic field

Article

关键词: 2-DIMENSIONAL ELECTRON-GAS;    EPITAXIAL GRAPHENE;    CYCLOTRON EMISSION;    LANDAU-LEVELS;    BERRYS PHASE;    SEMICONDUCTORS;    DYNAMICS;    RECOMBINATION;    SPECTROSCOPY;    GRAPHITE;   

DOI  :  10.1103/PhysRevB.80.245415

来源: SCIE

【 摘 要 】

A degenerate pump-probe technique is used to investigate the nonequilibrium carrier dynamics in multilayer graphene. Two distinctly different dynamics of the carrier relaxation are observed. A fast relaxation (similar to 50 fs) of the carriers after the initial effect of phase-space filling followed by a slower relaxation (similar to 4 ps) due to thermalization. Both relaxation processes are less efficient when a magnetic field is applied at low temperatures which is attributed to the suppression of the electron-electron Auger scattering due to the nonequidistant Landau-level spacing of the Dirac fermions in graphene.

【 授权许可】

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