Phys. Rev. B 67, 115311 (2003) [7 pages]Role of exchange interaction in Coulomb quantum kinetics |
T. Wolterink, V. M. Axt, and T. Kuhn
Institut für Festkörpertheorie, Universität Münster, Wilhelm-Klemm-Strasse 10, 48149 Münster, Germany
Received 29 August 2002; published 13 March 2003
In a quantum-kinetic approach based on density-matrix formulation we study the role of exchange interaction for ultrafast carrier relaxation. We find that the exchange contributions to scattering and screening tend to compensate each other. With very short times, however, due to the retarded buildup of the screening the exchange contribution to scattering prevails resulting in a reduced relaxation.
©2003 The American Physical Society
URL: http://link.aps.org/abstract/PRB/v67/e115311
DOI: 10.1103/PhysRevB.67.115311
PACS: 71.10.-w, 71.45.Gm, 73.21.Fg, 78.47.+p
[ Abstract | Previous article | Next article | Issue 11 ]
About PROLA | Terms and Conditions | Subscriptions | Search | Help
Content in PROLA © 2008 by The American Physical Society All rights reserved. PROLA™ is a trademark of The American Physical Society. Use of APS online journals implies that the user has read and agrees to the Terms and Conditions in the Subscription Agreement.