Detection of Conduction Electron Spin Polarization in n-GaAs by Negative Muonium

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• 作者：K. Yokoyama^a ; ¹ ; K. Nagamine^a ; ^b ; ^c ; K. Shimomura^b ; H.W.K. Tom^a ; R. Kawakami^a ; P. Bakule^d ; Y. Matsuda^e ; ² ; K. Ishida^e ; K. Ohishi^e ; F.L. Pratt^d ; I. Shiraki^f ; E. Torikai^f ; ^{et@yamanashi.ac.jp}
• 关键词：Laser 渭SR ; Spintronics ; spin exchange scattering ; Muonium minus ; LF decoupling
• 刊名：Physics Procedia
• 出版年：2012
• 期刊代码：P128_18753892
• 类别：ph
• 出版时间：2012
• 卷：30
• 期：Complete
• 页码：231-234
• 文件大小：395 K

摘要

In our ZF 渭⁺ SR studies of the spin-dependent response to the polarized conduction electrons produced by circularly polarized 830 nm laser light in a semi-metallic and strain-free n-type GaAs (3脳10¹⁶ cm^-3 Si), among possible states of positive muon, Mu^{鈭?/sup> (渭+e鈭?/sup>e鈭?/sup>) had been found to take a spin-dependent exchange scattering, while muonium (Mu0) at bond-center was found to be insensitive. In order to understand this surprising spin-dependent Mu鈭?/sup> response, the LF (up to 0.4 T) 渭+SR studies were carried out and data is suggesting a contribution of bound electron(s) of Mu鈭?/sup>. Possible mechanisms of the Mu鈭?/sup> response are given.}