On the Suppression of Electron-Hole Exchange Interaction in a Reservoir of Nonradiative Excitons
- Авторы: Eliseev S.1, Lovtcius V.1, Trifonov A.1, Ignatiev I.1, Kavokin K.1, Kavokin A.1, Shapochkin P.1, Efimov Y.1
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Учреждения:
- St. Petersburg State University
- Выпуск: Том 53, № 9 (2019)
- Страницы: 1170-1174
- Раздел: Xxiii International Symposium “Nanophysics and Nanoelectronics”, Nizhny Novgorod, March 11–14, 2019
- URL: https://journals.rcsi.science/1063-7826/article/view/206718
- DOI: https://doi.org/10.1134/S1063782619090239
- ID: 206718
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Аннотация
Mechanisms of the suppression of the electron-hole exchange interaction in nonradiative excitons with a large in-plane wave vector in high-quality heterostructures with quantum wells are analyzed theoretically. It is shown that the dominant suppression mechanism is exciton-exciton scattering accompanied by the mutual spin flips of like carriers (either two electrons or two holes), comprising the excitons. As a result, the electron spin polarization in nonradiative excitons may be retained for a long time. The analysis of experimental data shows that this relaxation time can exceed one nanosecond. This long-term and optically controllable spin memory in an exciton reservoir may be of interest for future information technologies.
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Об авторах
S. Eliseev
St. Petersburg State University
Email: i.ignatiev@spbu.ru
Россия, St. Petersburg, 198504
V. Lovtcius
St. Petersburg State University
Email: i.ignatiev@spbu.ru
Россия, St. Petersburg, 198504
A. Trifonov
St. Petersburg State University
Email: i.ignatiev@spbu.ru
Россия, St. Petersburg, 198504
I. Ignatiev
St. Petersburg State University
Автор, ответственный за переписку.
Email: i.ignatiev@spbu.ru
Россия, St. Petersburg, 198504
K. Kavokin
St. Petersburg State University
Email: i.ignatiev@spbu.ru
Россия, St. Petersburg, 198504
A. Kavokin
St. Petersburg State University
Email: i.ignatiev@spbu.ru
Россия, St. Petersburg, 198504
P. Shapochkin
St. Petersburg State University
Email: i.ignatiev@spbu.ru
Россия, St. Petersburg, 198504
Yu. Efimov
St. Petersburg State University
Email: i.ignatiev@spbu.ru
Россия, St. Petersburg, 198504