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Namozov,BR; Kozlov,II; Boiko,ME; Averkiev,NS; Kusrayev,YuG Optical orientation recovery of Mn2+ spins in the first excited state in bulk (Zn,Mn)Seстатья
- Авторы: Kozyrev NV, Baryshnikov KA
- Журнал: Physical Review B
- Том: 111
- Номер: 13
- Год издания: 2025
- Издательство: American Physical Society
- Местоположение издательства: United States
- Первая страница: 10
- Последняя страница: 1103
- DOI: 10.1103/PhysRevB.111.134432
- Аннотация: The optical orientation of Mn2+ spins in the first excited state 4T1 was experimentally observed in bulk Zn0.99Mn0.01Se in an external magnetic field of up to 6T in Faraday geometry at temperature 1.6 K. This occurred during quasiresonant continuous wave circularly polarized photoexcitation of the intracenter d-d transitions. A nonmonotonic dependence of the thermal circular polarization of the intracenter photoluminescence on the magnetic field was observed. A theoretical model is proposed to describe the selection rules for resonant optical d-d transitions of an isolated Mn2+ ion in a ZnSe cubic crystal. These rules are based on the analysis of the total angular momentum symmetry for the ground (6A1) and first excited (4T1) states of the Mn2+ ion. Additionally, the Jahn-Teller coupling of the excited state orbital parts with tetragonal (𝑒-type) local distortions of the crystal lattice is considered. This coupling results in the segregation of cubic axes and energy splitting for spin states with their projections of ±1/2 and ±3/2 on each axis in the corresponding atomic potential minimum. By introducing two different times of relaxation to reach thermodynamic equilibrium for ±1/2 and ±3/2 states in each Jahn-Teller configuration, an angle dependent optical orientation contribution in photoluminescence polarization arises in the presence of a magnetic field.
- Добавил в систему: Бойко Михаил Евгеньевич