Photo-Induced Inverse Spin Hall Effect in Au/InP hybrid structure
Photo-induced inverse spin Hall effect (ISHE) measurements on a Au/InP metal–semiconductor junction are performed. Spin polarized electrons, which are generated in InP by the circularly polarized laser light of 2.33 eV (532 nm), provide a net spin current in thin Au-layer after crossing the Schottky barrier. This generates a transverse electric current because of large spin orbit coupling in Au-layer. ISHE origin of the measured signal is confirmed by a linear variation of the spin current with the degree of circular polarization of incident light. Furthermore, angle dependence of spin current matches well with the predicted trends.
Index TermsInverse spin Hall effect Spin relaxation
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Authors acknowledge Dr. P.D. Gupta, Director, Raja Ramanna Centre for Advanced Technology for the support and encouragement during the period of work. The technical help of Shri U.K. Ghosh and Mr. Alexander Khakha is also acknowledged.
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