Hot carrier cooling by acoustic phonons in epitaxial graphene by ultrafast pump-probe spectroscopy

Sun, Dong; Divin, Charles; Berger, Claire; de Heer, Walt A.; First, Phillip N.; Norris, Theodore B.

2011-04

Citation: Sun, Dong; Divin, Charles; Berger, Claire; de Heer, Walt A.; First, Phillip N.; Norris, Theodore B. (2011). "Hot carrier cooling by acoustic phonons in epitaxial graphene by ultrafast pump-probe spectroscopy." physica status solidi c 8(4): 1194-1197. <http://hdl.handle.net/2027.42/83459>

Abstract: We report the application nondegenerate ultrafast mid-infrared spectroscopy to investigate the acoustic phonon cooling process in epitaxial graphene. We show that the power-dependent experimental results match theoretical predictions of the low temperature acoustic cooling process. The hot phonon effect in acoustic phonon cooling is observed experimentally, and a deformation potential of 30 eV can be determined from fitting the data. (© 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

ISSN: 1862-6351, 1610-1642

DOIs: 10.1002/pssc.201001134

Handle: http://hdl.handle.net/2027.42/83459

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