Abstract
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.
- Received 29 August 2002
DOI:https://doi.org/10.1103/PhysRevB.67.115311
©2003 American Physical Society
