Spin-Polarized Tunneling between Optically Pumped GaAs(110) Surface and Spin-Polarized Tip
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概要
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We performed spin-polarized scanning tunneling spectroscopy (SP-STS) on the optically pumped GaAs(110) surface with the Fe-coated W tip to investigate the spin-polarized tunneling effect between them. The optical effects that could be superimposed on the spin-dependent signal were carefully investigated with the nonmagnetic W tip. In the SP-STS experiment, the intensity and circular-polarization of the light were simultaneously modulated, and the modulation signals of the tunneling current were compared in order to distinguish the spin dependent component. We demonstrated that the spin-dependent tunneling effect could be detected when we carefully choose the energy range to avoid the parasitic optical effect.
- 2011-08-25
著者
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Ishida Nobuyuki
Graduate School Of Engineering Hokkaido University
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Sueoka Kazuhisa
Graduate School of Engineering, Hokkaido University, Kita-13 Nishi-8, Kita-ku, Sapporo 060-8628, Japan
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Sueoka Kazuhisa
Graduate School of Information Science and Technology, Hokkaido University, Sapporo 060-0814, Japan
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Ishida Nobuyuki
Graduate School of Information Science and Technology, Hokkaido University, Sapporo 060-0814, Japan
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