物理学报2012，Vol.61Issue(3)：442-448,7.
（Ga,Mn）As中电流诱导自旋极化的磁光Kerr测量
Observation of current-induced polarization in（Ga,Mn）As via magneto-optic Kerr measurement
摘要
Abstract
Current-induced Kerr rotation spectra and reflectivity spectra of（Ga,Mn）As and p-GaAs are measured in the absence of the magnetic field via magneto-optic Kerr effect around the energy gap.The dependences of the Kerr rotation and the reflectivity on the laser wavelength show Lorentzian profile.The Kerr rotation depends linearly on the current,and the reflectivity depends linearly on the square of the current.The Kerr rotation of p-GaAs is much weaker than that of the（Ga,Mn）As,which indicates that the doping of Mn enhances the current-induced spin polarization.The dependences of the Kerr rotation and the reflectivity on temperature are also measured,both showing red shifts of their Lorentzian peaks,a familiar behavior as the absorption edge of GaAs.In addition,we observe the dependence of the Kerr signal on the polarizational direction of the incident beam.关键词
自旋电子学/稀磁半导体/电流诱导自旋极化Key words
spintronics/diluted magnetic semiconductor/current-induced spin polarization分类
数理科学引用本文复制引用
谷晓芳,钱轩,姬扬,陈林,赵建华..（Ga,Mn）As中电流诱导自旋极化的磁光Kerr测量[J].物理学报,2012,61(3):442-448,7.基金项目
国家重点基础研究发展计划 （）
国家自然科学基金（批准号：10911130232）资助的课题 （）
