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题名: Photoinduced spin alignment of the magnetic ions in (Ga,Mn)As
作者: Sun BQ (Sun Baoquan);  Jiang DS (Jiang Desheng);  Sun Z (Sun Zheng);  Ruan XZ (Ruan Xuezhong);  Deng JJ (Deng Jiajun);  Zhao JH (Zhao Jianhua);  Ji Y (Ji Yang);  Xu ZY (Xu Zhongying)
发表日期: 2006
摘要: Time-resolved Kerr rotation measurement in the (Ga,Mn)As diluted magnetic semiconductor allows direct observation of the dynamical properties of the spin system of the magnetic ions and the spin-polarized holes. Experimental results show that the magnetic ions can be aligned by the polarized holes, and the time scales of spin alignment and relaxation take place in tens and hundreds of picoseconds, respectively. The Larmor frequency and effective g factor obtained in the Voigt geometry show an unusual temperature dependence in the vicinity of the Curie temperature due to the exchange coupling between the photoexcited holes and magnetic ions. Such a spin coherent precession can be amplified or destructed by two sequential excitation pulses with circularly copolarized or oppositely polarized helicity, respectively. (c) 2006 American Institute of Physics.
KOS主题词: Larmor precession;  Dynamics;  Polarons;  Electron paramagnetic resonance spectroscopy;  alpha-particle spectra;  Optical spectrometers;  Spectrum analysis;  Organization;  Carriers
刊名: JOURNAL OF APPLIED PHYSICS
专题: 中国科学院半导体研究所(2009年前)_期刊论文

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Sun BQ (Sun Baoquan); Jiang DS (Jiang Desheng); Sun Z (Sun Zheng); Ruan XZ (Ruan Xuezhong); Deng JJ (Deng Jiajun); Zhao JH (Zhao Jianhua); Ji Y (Ji Yang); Xu ZY (Xu Zhongying) .Photoinduced spin alignment of the magnetic ions in (Ga,Mn)As ,JOURNAL OF APPLIED PHYSICS,2006 ,100(8):Art.No.083104
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