Naslov
Entangled and disentangled decoherence of intermediate electron-hole pairs in two-photon-photoemission from surface bands: beyond the adiabatic approximation

Autori
El-Shaer, Faris ; Gumhalter, Branko

Izvornik
Physical review letters (0031-9007) 93 (2004); 236804-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Decoherence; two-photon photoemission; image potential bands

Sažetak
We discuss the effects which combinations of entangled and disentangled decoherence and transient response induce on the early decay of coherent electron-hole pairs in the intermediate states of two-photon-photoemission (2PPE) from image potential bands. We find that their interplay gives rise to deviations of the pair decay probabilities from simple exponential laws governed by independent quasiparticle lifetimes obtained in the selfenergy approaches based on the adiabatic hypothesis. Assessment of these effects for paradigmatic Cu(111) surface shows that they are most pronounced in the interval of pump-probe photon pulse delay times typical of current 2PPE experiments.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA