1. Quantum dot spin pure‐dephasing due to bulk magnons at low temperatures
- Author
-
Jurij Krasnyj, Witold Jacak, and Lucjan Jacak
- Subjects
Physics ,Quantum decoherence ,Condensed matter physics ,Condensed Matter::Other ,Quantum dot ,Dephasing ,Exciton ,Magnon ,Magnetic semiconductor ,Condensed Matter::Mesoscopic Systems and Quantum Hall Effect ,Condensed Matter Physics ,Scaling ,Spin-½ - Abstract
We demonstrate disappearance at 0 T = 0, and strong reduction at low temperatures, of pure-dephasing of exciton spin located in a quantum dot (QD) embedded in a magnetic medium, e.g. in a diluted magnetic semiconductor. The off-diagonal spin decoherence results due to hybridization of local QD exciton spin with magnons from surrounding crystal–we estimate the corresponding time-scale and formulate a general rule for the scaling of dephasing time versus QD diameter derived within the Green function approach (© 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) more...
- Published
- 2009
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