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19 April 2024

» pubmed » pmid15783775

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Femtosecond transfer dynamics of photogenerated electrons at a surface resonance of reconstructed InP(100)
L Töben ; L Gundlach ; R Ernstorfer ; R Eichberger ; T Hannappel ; F Willig ; A Zeiser ; J Förstner ; A Knorr ; P H Hahn ; W G Schmidt ;
Date:	18 Feb 2005
Journal:	Phys Rev Lett, 94 (6), 067601
Abstract:	Time-dependent two-photon photoemission spectra are used to resolve the femtosecond dynamics of hot electrons at the energetically lowest surface resonance of reconstructed InP(100). Two different cases are studied, where electrons either are lifted into the surface resonance via a direct optical transition or are captured from bulk states. These data are the first of this kind recorded with a time resolution below 70 fs. The microscopic analysis shows that electron-phonon scattering is a major mechanism for electron transfer between surface and bulk states.
Source:	PubMed, pmid15783775
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