Home News About Us Contact Contributors Disclaimer Privacy Policy Help FAQ

Home
Search
Quick Search
Advanced
Fulltext
Browse
Collections
Persons
My eDoc
Session History
Login
Name:
Password:
Documentation
Help
Support Wiki
Direct access to
document ID:


          Institute: Fritz-Haber-Institut     Collection: Theory     Display Documents



  history
ID: 285993.0, Fritz-Haber-Institut / Theory
Theory of optical excitation and relaxation phenomena at semiconductor surfaces: linking density functional and density matrix theory
Authors:Buecking, Norbert; Scheffler, Matthias; Kratzer, Peter; Knorr, Andreas
Language:English
Date of Publication (YYYY-MM-DD):2007-06-09
Title of Journal:Applied Physics A
Journal Abbrev.:Appl. Phys. A
Volume:88
Start Page:505
End Page:518
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:A theory for the description of optical excitation and the subsequent phonon-induced relaxation dynamics of nonequilibrium electrons at semiconductor surfaces is presented. In the first part, the fundamental dynamical equations for electronic occupations and polarisations are derived using density matrix formalism (DMT) for a surface-bulk system including the interaction of electrons with the optical field and electron–phonon interactions. The matrix elements entering these equations are either determined empirically or by density functional theory (DFT) calculations. In the subsequent parts of the paper, the dynamics at two specific semiconductor surfaces are discussed in detail. The electron relaxation dynamics underlying a time-resolved two photon photoemission experiment at an InP surface is investigated in the limit of a parabolic four band model. Moreover, the electron relaxation dynamics at a Si(100) surface is analysed. Here, the coupling parameters and the band structure are obtained from an DFT calculations.
External Publication Status:published
Document Type:Article
Communicated by:Matthias Scheffler
Affiliations:Fritz-Haber-Institut/Theory
External Affiliations:Institut für Theoretische Physik, Nichtlineare Optik und Quantenelektronik, Technische Universität Berlin,
Hardenbergstr. 36, PN 7-1, 10623 Berlin, Germany

Fachbereich Physik – Theoretische Physik, Universität Duisburg-Essen, Lotharstr. 1, 47048 Duisburg, Germany
Identifiers:URL:http://www.fhi-berlin.mpg.de/th/th.html [For a reprint, please contact THsecretary@fhi-berlin.mpg.de]
URL:http://dx.doi.org/10.1007/s00339-007-4043-4 [only for subscriber]
The scope and number of records on eDoc is subject to the collection policies defined by each institute - see "info" button in the collection browse view.