Non-Markoffian theory of electron spin decoherence in a single quantum dot

T. Takagahara

研究成果: Conference contribution

抄録

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.

本文言語English
ホスト出版物のタイトルPhysics of Semiconductors - 28th International Conference on the Physics of Semiconductors, ICPS 2006, Part A and B
ページ1333-1334
ページ数2
DOI
出版ステータスPublished - 2007 12月 1
外部発表はい
イベント28th International Conference on the Physics of Semiconductors, ICPS 2006 - Vienna, Austria
継続期間: 2006 7月 242006 7月 28

出版物シリーズ

名前AIP Conference Proceedings
893
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

Other

Other28th International Conference on the Physics of Semiconductors, ICPS 2006
国/地域Austria
CityVienna
Period06/7/2406/7/28

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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