Acoustically induced spin-orbit interactions revealed by two-dimensional imaging of spin transport in GaAs |
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Authors: | Sanada H Sogawa T Gotoh H Onomitsu K Kohda M Nitta J Santos P V |
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Institution: | NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-0198, Japan. sanada.haruki@lab.ntt.co.jp |
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Abstract: | Magneto-optic Kerr microscopy was employed to investigate the spin-orbit interactions of electrons traveling in semiconductor quantum wells using surface acoustic waves (SAWs). Two-dimensional images of the spin flow induced by SAWs exhibit anisotropic spin precession behaviors caused by the coexistence of different types of spin-orbit interactions. The dependence of spin-orbit effective magnetic fields on SAW intensity indicates the existence of acoustically controllable spin-orbit interactions resulting from the strain and Rashba contributions induced by the SAWs. |
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