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Slowing hot-carrier relaxation in graphene using a magnetic field

P. Plochocka, P. Kossacki, A. Golnik, T. Kazimierczuk, C. Berger, W. A. de Heer, M. Potemski
2009 Physical Review B  

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2009 pre-print arXiv:0906.1104v1 fatcat:kmoacaerergtdhbprd64tf2rxa

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2009 accepted
arXiv:0906.1104v2 fatcat:2tegv5a6zvbznnfqims64c3is4
A degenerate pump--probe technique is used to investigate the non equilibrium carrier dynamics in multi--layer graphene. Two distinctly different dynamics of the carrier relaxation are observed. A fast relaxation (∼ 50 fs) of the carriers after the initial effect of phase space filling followed by a slower relaxation (∼ 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
more » ... ron-electron Auger scattering due to the non equidistant Landau level spacing of the Dirac fermions in graphene.
doi:10.1103/physrevb.80.245415 fatcat:d3aopvxlrbfmhpkkm6gfungmsq
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P. Plochocka, P. Kossacki, A. Golnik, T. Kazimierczuk, C. Berger, W. A. de Heer, M. Potemski. "Slowing hot-carrier relaxation in graphene using a magnetic field." Physical Review B 80.24 (2009)