Abstract
We investigate theoretically the electron spin relaxation and decoherence rates in a single quantum disk and clarify their dependence on the magnetic field strength, the temperature and the strength of quantum confinement. In the weak confinement regime, the spin relaxation rate at low temperatures is dominated by the two-phonon processes and its dependence on the magnetic field is rather weak. In the strong confinement regime, on the other hand, the spin relaxation rate at low temperatures is governed by the one-phonon processes and exhibits the characteristic B4 dependence on the magnetic field (B). Non-Markoffian theory is developed for the electron spin decoherence rate due to the electron-phonon interactions based on the double Feynman diagrams. The dependencies of the electron spin decoherence rate on the magnetic field and the temperature are clarified.
| Original language | English |
|---|---|
| Title of host publication | AIP Conference Proceedings |
| Pages | 1333-1334 |
| Number of pages | 2 |
| Volume | 893 |
| DOIs | |
| Publication status | Published - 2007 |
| Externally published | Yes |
| Event | 28th International Conference on the Physics of Semiconductors, ICPS 2006 - Vienna, Austria Duration: 2006 Jul 24 → 2006 Jul 28 |
Other
| Other | 28th International Conference on the Physics of Semiconductors, ICPS 2006 |
|---|---|
| Country | Austria |
| City | Vienna |
| Period | 06/7/24 → 06/7/28 |
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Keywords
- Electron spin decoherence
- Electron spin relaxation
- Electron-phonon interactions
- Quantum disk
ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Non-Markoffian theory of electron spin decoherence in a single quantum dot. / Takagahara, Toshihide.
AIP Conference Proceedings. Vol. 893 2007. p. 1333-1334.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Non-Markoffian theory of electron spin decoherence in a single quantum dot
AU - Takagahara, Toshihide
PY - 2007
Y1 - 2007
N2 - We investigate theoretically the electron spin relaxation and decoherence rates in a single quantum disk and clarify their dependence on the magnetic field strength, the temperature and the strength of quantum confinement. In the weak confinement regime, the spin relaxation rate at low temperatures is dominated by the two-phonon processes and its dependence on the magnetic field is rather weak. In the strong confinement regime, on the other hand, the spin relaxation rate at low temperatures is governed by the one-phonon processes and exhibits the characteristic B4 dependence on the magnetic field (B). Non-Markoffian theory is developed for the electron spin decoherence rate due to the electron-phonon interactions based on the double Feynman diagrams. The dependencies of the electron spin decoherence rate on the magnetic field and the temperature are clarified.
AB - We investigate theoretically the electron spin relaxation and decoherence rates in a single quantum disk and clarify their dependence on the magnetic field strength, the temperature and the strength of quantum confinement. In the weak confinement regime, the spin relaxation rate at low temperatures is dominated by the two-phonon processes and its dependence on the magnetic field is rather weak. In the strong confinement regime, on the other hand, the spin relaxation rate at low temperatures is governed by the one-phonon processes and exhibits the characteristic B4 dependence on the magnetic field (B). Non-Markoffian theory is developed for the electron spin decoherence rate due to the electron-phonon interactions based on the double Feynman diagrams. The dependencies of the electron spin decoherence rate on the magnetic field and the temperature are clarified.
KW - Electron spin decoherence
KW - Electron spin relaxation
KW - Electron-phonon interactions
KW - Quantum disk
UR - http://www.scopus.com/inward/record.url?scp=77958472069&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77958472069&partnerID=8YFLogxK
U2 - 10.1063/1.2730395
DO - 10.1063/1.2730395
M3 - Conference contribution
AN - SCOPUS:77958472069
SN - 9780735403970
VL - 893
SP - 1333
EP - 1334
BT - AIP Conference Proceedings
ER -