Picosecond dynamics of magnetic polarons in Cd1−xMnxTe
Picosecond dynamics of magnetic polarons in Cd1−xMnxTe
复制标题
Cd1−xMnxTe 中磁极化子的皮秒动力学
DOI：
10.1016/0022-2313(87)90123-2
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发表时间：
1987
影响因子：
3.6
通讯作者：
H. Fujisaki
中科院分区：
文献类型：
--
作者：
Y. Oka;K. Nakamura;I. Souma;M. Kido;H. Fujisaki
本文报道了Cd 1 −xMnxTe（x=0.05-0.6）中磁极化子的动力学行为。x =0.05−0.1的样品中的激子发光显示了受体结合MP的动力学，其中结合MP的形成时间为1-2 ns。对于x =0.2 - 0.4，自由MP被创建并在波动的带隙中弛豫到深度局域态，形成局域MP。当x ≤ 0.5时，MP的寿命减小到小于250 ps，这是由于激子能量向Mn离子d电子的快速能量转移所致。发现Mn自旋的自旋玻璃有序性对低温下的MP能量有影响。
We report the dynamical behavior of magnetic polarons (MPs) in Cd1−xMnxTe (x=0.05-0.6). Exciton Luminescence in samples ofx=0.05−0.1 shows the dynamics of the acceptor-bound MP, where the formattion time of the bound MP is 1–2 ns. Forx=0.2−0.4 the free MP is created and relaxes into deep localized states in the fluctuating band gap, forming the localized MP. Forx⩾0.5 the lifetime of the MP decreases to less than 250 ps, which is caused by fast-energy transfer of the exciton energy to delectrons of the Mn ions. The spin-glass ordering of the Mn spins forx⩾0.2 at low temperature is found to affect the MP energies.