Extreme ultrafast dynamics of quasiparticles excited in surface electronic bands

Lazić, Predrag; Silkin, Vjaćeslav M.; Chulkov, Evgenij V.; Echenique, Pedro M.; Gumhalter, Branko (2006) Extreme ultrafast dynamics of quasiparticles excited in surface electronic bands. Physical Review Letters, 97 (8). 086801-1. ISSN 0031-9007

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Abstract

We develop a many-body description of nonadiabatic dynamics of quasiparticles in surface bands valid on the extreme ultrashort time scale by combining the formalism for calculation of quasiparticle survival probabilities with the selfconsistent treatment of electronic response of the system. Applying this approach to the benchmark Cu(111) surface we assess the behavior and intervals of preasymptotic electron and hole dynamics in surface bands and locate the transition to asymptotic regime of exponential quasiparticle decay characterized by the corrected Fermi golden rule-type of transition rate. The general validity of these findings enables distinguishing the various regimes of ultrafast electron dynamics that may be revealed in time resolved experiments.

Item Type:	Article
Uncontrolled Keywords:	surface electronic bands; ultrafast dynamics; decay; decoherence
Subjects:	NATURAL SCIENCES > Physics
Divisions:	Theoretical Physics Division
Projects:	Project title Project leader Project code Project type Fizika površina, mikrostruktura i jako koreliranih sistema UNSPECIFIED 0098001 UNSPECIFIED Modeliranje svojstava mikro- i nanostrukturiranih površina UNSPECIFIED 0035017 UNSPECIFIED
Depositing User:	Predrag Lazić
Date Deposited:	31 Jan 2013 14:22
URI:	http://fulir.irb.hr/id/eprint/489
DOI:	10.1103/PhysRevLett.97.086801

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