Subnanosecond magnetization dynamics induced by a pulsed magnetic field in diluted magnetic semiconductor quantum wells

Y. S. Chen; M. Wiater; G. Karczewski; T. Wojtowicz; G. Bacher

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Subnanosecond magnetization dynamics induced by a pulsed magnetic field in diluted magnetic semiconductor quantum wells

机译：稀磁半导体量子阱中脉冲磁场引起的亚纳秒磁化动力学

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The magnetization dynamics induced by a pulsed magnetic field is investigated by time- and polarization-resolved photoluminescene measurements in (Cd,Mn)Te/(Cd,Mg)Te quantum wells. The magnetization dynamics of Mn~(2+) ions is found to be strongly dependent on the external static magnetic field. A dynamical response of the magnetization on a subnanosecond time scale is observed at zero static magnetic field, while it drastically slows down and approaches the spin-lattice relaxation time constant for a nonzero static field. Theoretical calculations emphasize the importance of local spin interactions that interplay with the Zeeman interaction for the observed magnetization dynamics.

机译：通过在（Cd，Mn）Te /（Cd，Mg）Te量子阱中通过时间分辨和极化分辨光致发光测量，研究了由脉冲磁场引起的磁化动力学。发现Mn〜（2+）离子的磁化动力学强烈依赖于外部静磁场。在零静态磁场下，可以观察到亚纳秒级的磁化强度的动态响应，而在非零静态磁场下，磁化强度会急剧降低并接近自旋晶格弛豫时间常数。理论计算强调了对于观测的磁化动力学，与塞曼相互作用相互作用的局部自旋相互作用的重要性。

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来源
《Physical review》 |2013年第15期|155301.1-155301.8|共8页
作者
Y. S. Chen; M. Wiater; G. Karczewski; T. Wojtowicz; G. Bacher;
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作者单位

Werkstoffe der Elektrotechnik and CeNIDE, Universitaet Duisburg-Essen, Bismarckstr. 81, D-47057, Duisburg, Germany,IBM Zurich Research Lab, Rueschlikon, CH-8803, Switzerland;

Institute of Physics, Polish Academy of Science, Al. Lotnikow32/46, 02-668, Warsaw, Poland;

Institute of Physics, Polish Academy of Science, Al. Lotnikow32/46, 02-668, Warsaw, Poland;

Institute of Physics, Polish Academy of Science, Al. Lotnikow32/46, 02-668, Warsaw, Poland;

Werkstoffe der Elektrotechnik and CeNIDE, Universitaet Duisburg-Essen, Bismarckstr. 81, D-47057, Duisburg, Germany;

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semiconductors;

机译：半导体;

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Subnanosecond magnetization dynamics induced by a pulsed magnetic field in diluted magnetic semiconductor quantum wells

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