Annealing effect on the electron spin dynamics in heavily Mn-doped (Ga,Mn)As
Annealing effect on the electron spin dynamics in heavily Mn-doped (Ga,Mn)As
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退火对重Mn掺杂(Ga,Mn)As电子自旋动力学的影响
DOI:
10.3938/jkps.64.1504
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发表时间:
2010-12
影响因子:
0.6
通讯作者:
Zhang, Xinhui
中科院分区:
文献类型:
--
作者:
Chen, Lin;Gao, Haixia;Zhao, Jianhua;Zhang, Xinhui
A temperature- and photo-excitation-density-dependent electron spin dephasing process has been studied by time-resolved magneto-optical Kerr effect (TR-MOKE) measurements for heavily-doped (Ga,Mn)As after appropriate annealing treatment. Unlike the as-grown (Ga,Mn)As in which s-d scattering is dominant for spin dephasing at low temperature, the exchange scattering induced by Mn ions is efficiently suppressed after annealing. For annealed (Ga,Mn)As, the p-d exchange coupling proves to be important for the electron spin dephasing process. Moreover, the Coulomb scattering arising from the weakly-localized holes and Mn impurities is revealed to play an important role in the electron spin dephasing after annealing. Our results demonstrate that the impurityinduced disorder plays a significant role in the electron spin-dephasing process in (Ga,Mn)As when Mn is over doped by as much as 15%, which is a critical issue that needs to be considered to achieve high-quality (Ga,Mn)As thin films with a higher Curie temperature TC and better functionality.
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DOI:
10.1007/springerreference_3556
发表时间:
2008
期刊:
--
影响因子:
--
作者:
Y. Kusrayev;Boris Petrovich
通讯作者:
Y. Kusrayev;Boris Petrovich
影响因子:
41.2
作者:
Roberto C. Myers;M. Mikkelsen;Jian-Ming Tang;Jian-Ming Tang;A. Gossard;M. Flatté;D. Awschalom
通讯作者:
Roberto C. Myers;M. Mikkelsen;Jian-Ming Tang;Jian-Ming Tang;A. Gossard;M. Flatté;D. Awschalom
影响因子:
8.6
作者:
G. Astakhov;R. I. Dzhioev;K. Kavokin;V. L. Korenev;M. V. Lazarev;M. N. Tkachuk;Y. Kusrayev;T. Kießling;W. Ossau;L. Molenkamp
通讯作者:
G. Astakhov;R. I. Dzhioev;K. Kavokin;V. L. Korenev;M. V. Lazarev;M. N. Tkachuk;Y. Kusrayev;T. Kießling;W. Ossau;L. Molenkamp
影响因子:
--
作者:
S. Takada
通讯作者:
S. Takada
DOI:
10.1016/b978-0-444-86741-4.50012-3
发表时间:
1984
期刊:
Modern Problems in Condensed Matter Sciences
影响因子:
--
作者:
F. Meier;D. Pescia
通讯作者:
F. Meier;D. Pescia