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Laser‐driven electron dynamics at interfaces
Author(s) -
Saalfrank Peter,
Klamroth Tillmann,
Huber Christian,
Krause Pascal
Publication year - 2005
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1560/nm0d-wwp5-vphu-qmtp
Subject(s) - chemistry , electron , excited state , atomic physics , quantum , atomic electron transition , laser , spectral line , molecular physics , quantum mechanics , physics
In this paper we present time‐dependent, quantum‐dynamical simulations of photoinduced processes at solid surfaces involving nonadiabatic transitions of electrons to and from short‐lived intermediate excited states. In particular, two‐photon photoemission (2PPE) spectra of naked metal surfaces and free‐standing metal films are considered. One major problem in both cases is the presence of electron—electron scattering, which is treated here in various ways. The first way is to adopt an open‐system density matrix approach, in which a single electron is weakly coupled to a “bath” of other electrons. The second approach is based on a many‐electron Schrödinger equation, which is solved with the help of a time‐dependent configuration interactions singles (TD—CIS) method.