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Role of exchange interaction in Coulomb quantum kinetics

Title data

Wolterink, T. ; Axt, Vollrath M. ; Kuhn, Tilmann:
Role of exchange interaction in Coulomb quantum kinetics.
In: Physical Review B. Vol. 67 (2003) Issue 11 . - No. 115311, 7 Seiten.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.67.115311

Project information

Project financing: Deutsche Forschungsgemeinschaft
TMR network Ultrafast Quantum Optoelectronics of the European Commission.

Abstract in another language

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.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Screening build-up; quantum wells; electronic screening; dynamical screening; correlations; microscopic theory; semiconductors; ultrafast dynamics; random phase approximation (RPA); Coulomb quantum kinetics; two-particle density matrix; exchange
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III > Chair Theoretical Physics III - Univ.-Prof. Dr. Martin Axt
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III
Result of work at the UBT: No
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 23 Oct 2017 08:34
Last Modified: 23 Oct 2017 08:34
URI: https://eref.uni-bayreuth.de/id/eprint/40106