Hot carrier cooling by acoustic phonons in epitaxial graphene by ultrafast pump‐probe spectroscopy | Zendy

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

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

Author(s) -

Sun Dong,

Divin Charles,

Berger Claire,

de Heer Walt A.,

First Phillip N.,

Norris Theodore B.

Publication year - 2011

Publication title -

physica status solidi c

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.21

H-Index - 46

eISSN - 1610-1642

pISSN - 1862-6351

DOI - 10.1002/pssc.201001134

Subject(s) - phonon , graphene , ultrashort pulse , materials science , epitaxy , spectroscopy , condensed matter physics , optoelectronics , optics , nanotechnology , physics , laser , quantum mechanics , layer (electronics)

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)

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