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

Autor: Eiko Torikai, Koichiro Shimomura, K. Yokoyama, Roland Kawakami, Katsuhiko Ishida, Francis L. Pratt, K. Ohishi, Harry W. K. Tom, Yasuhiro H. Matsuda, Ichiro Shiraki, Kanetada Nagamine, Pavel Bakule
Rok vydání: 2012
Předmět:
Zdroj: Physics Procedia. 30:231-234
ISSN: 1875-3892
Popis: In our ZF μ + 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 (3×10 16 cm -3 Si), among possible states of positive muon, Mu − ( μ + e − e − ) had been found to take a spin-dependent exchange scattering, while muonium (Mu 0 ) at bond-center was found to be insensitive. In order to understand this surprising spin-dependent Mu − response, the LF (up to 0.4 T) μ + SR studies were carried out and data is suggesting a contribution of bound electron(s) of Mu − . Possible mechanisms of the Mu − response are given.
Databáze: OpenAIRE