Year: 2005
Type: article
Abstract: Electron spin relaxation induced by phonon-mediated $s\text{\ensuremath{-}}d$ exchange interaction in a II-VI diluted magnetic semiconductor quantum dot is investigated theoretically. The electron--acoustic phonon interaction due to piezoelectric coupling and deformation potential is included. The resulting spin lifetime is typically on the order of microseconds. The effectiveness of the phonon-mediated spin-flip mechanism increases with increasing Mn concentration, electron spin splitting, vertical confining strength, and lateral diameter, while it shows nonmonotonic dependence on the magnetic field and temperature. An interesting finding is that the spin relaxation in a small quantum dot is suppressed for strong magnetic field and low Mn concentration at low temperature.
Source: Physical Review B
Authors: W. Yang, K. Chang
Institutions: Chinese Academy of Sciences, Institute of Semiconductors
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1970523799