Reference : Ultrafast electron-phonon decoupling in graphite

	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics
	To cite this reference:	http://hdl.handle.net/10993/10571

Title :	Ultrafast electron-phonon decoupling in graphite
Language :	English
Author, co-author :	Ishioka, Kunie [National Institute for Materials Science > Advanced Nano-Characterization Center]
	Hase, Muneaki [National Institute for Materials Science > Advanced Nano-Characterization Center]
	Kitajima, Masahiro [National Institute for Materials Science > Advanced Nano-Characterization Center]
	Wirtz, Ludger [CNRS UMR 8520 > Institute for Electronics, Microelectronics, and Nanotechnology]
	Rubio, Angel [European Theoretical Spectroscopy Facility, Universidad del País Vasco, Centro Mixto CSIC-UPV/EHU and Donostia International Physics Center]
	Petek, Hrvoje [Department of Physics and Astronomy, University of Pittsburgh and Donostia International Physics Center]
Publication date :	2008
Journal title :	Physical Review. B
Volume :	77
Issue/season :	12
Peer reviewed :	Yes (verified by ORBilu)
Audience :	International
ISSN :	1098-0121
Abstract :	[en] We report the ultrafast dynamics of the 47.4 THz coherent phonons of graphite interacting with a photoinduced nonequilibrium electron-hole plasma. Unlike conventional materials, upon photoexcitation the phonon frequency of graphite upshifts, and within a few picoseconds relaxes to the stationary value. Our first-principles density functional calculations demonstrate that the phonon stiffening stems from the light-induced decoupling of the nonadiabatic electron-phonon interaction by creating a nonequilibrium electron-hole plasma. Time-resolved vibrational spectroscopy provides a window on the ultrafast nonquilibrium electron dynamics.
Permalink :	http://hdl.handle.net/10993/10571
DOI :	10.1103/PhysRevB.77.121402

	File(s) associated to this reference
	Fulltext file(s): File Commentary Version Size Access Open access PhysRevB.77.121402.pdf Publisher postprint 217.98 kB View/Open

All documents in ORBi^lu are protected by a user license.

 

University of Luxembourg Library |  Feedback |  Legal notices Site Map