Electron spin dynamics and optical orientation of Mn2+ ions in GaAs

Electron spin dynamics and optical orientation of Mn2+ ions in GaAs
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GaAs 中 Mn2 离子的电子自旋动力学和光学取向

DOI:
10.1063/1.4795527
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发表时间:
2013
期刊:
影响因子:
--
通讯作者:
M. Bayer
M. Bayer
中科院分区:
--
文献类型:
--
作者:
I. Akimov;R. I. Dzhioev;V. L. Korenev;Y. Kusrayev;V. Sapega;D. Yakovlev;M. Bayer

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本文综述了掺杂低浓度mn受体(低于1018 cm−3)的砷化镓中自旋相关现象。我们结合了不同的实验技术,如自旋翻转拉曼散射和时间分辨光致发光。这允许评估电子和Mn自旋的时间演化。我们发现,在弱磁场的作用下,锰离子的光学取向是可能的,这需要抑制锰的自旋弛豫。光学取向的Mn2+离子保持了自旋,并将部分极化返回到电子自旋系统,提供了长寿命的电子自旋记忆。这导致了有效交换场中的非指数电子自旋衰减和自旋进动等一系列引人注目的效应。
We present an overview of spin-related phenomena in GaAs doped with low concentration of Mn-acceptors (below 1018 cm−3). We use the combination of different experimental techniques such as spin-flip Raman scattering and time-resolved photoluminescence. This allows to evaluate the time evolution of both electron and Mn spins. We show that optical orientation of Mn ions is possible under application of weak magnetic field, which is required to suppress the manganese spin relaxation. The optically oriented Mn2+ ions maintain the spin and return part of the polarization back to the electron spin system providing a long-lived electron spin memory. This leads to a bunch of spectacular effects such as non-exponential electron spin decay and spin precession in the effective exchange fields.
DOI: 10.1103/physrevlett.80.4313
发表时间: 1998-05-11
影响因子: 8.6
作者:
Kikkawa, JM;Awschalom, DD
通讯作者: Awschalom, DD