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

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 ef...

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Bibliographic Details
Published inPhysica status solidi. C Vol. 8; no. 4; pp. 1194 - 1197
Main Authors Sun, Dong, Divin, Charles, Berger, Claire, de Heer, Walt A., First, Phillip N., Norris, Theodore B.
Format Journal Article
LanguageEnglish
Published Berlin WILEY-VCH Verlag 01.04.2011
WILEY‐VCH Verlag
Subjects
acoustic phonons
Acoustics
Cooling
Cooling effects
Epitaxy
Graphene
hot carrier cooling
Phonons
pump-probe spectroscopy
Solid state physics
Spectroscopy
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Summary: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)
Bibliography:istex:F61FC7FADD2EDEA8F07A4DF48E97895DA0E8037F
ark:/67375/WNG-049W76NM-X
ArticleID:PSSC201001134
NSF MRSEC - No. 0820382
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1862-6351
1610-1642
1610-1642
DOI:10.1002/pssc.201001134