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- W2026006976 abstract "The generation of spin-polarized electrons at room temperature is an essential step in developing semiconductor spintronic applications. To this end, we studied the electronic states of a Ge(111) surface, covered with a lead monolayer at a fractional coverage of 4/3, by angle-resolved photoelectron spectroscopy (ARPES), spin-resolved ARPES and first-principles electronic structure calculation. We demonstrate that a metallic surface-state band with a dominant Pb 6p character exhibits a large Rashba spin splitting of 200 meV and an effective mass of 0.028 me at the Fermi level. This finding provides a material basis for the novel field of spin transport/accumulation on semiconductor surfaces. Charge density analysis of the surface state indicated that large spin splitting was induced by asymmetric charge distribution in close proximity to the nuclei of Pb atoms. Semiconductor spintronics applications require materials that can exhibit large spin-splitting while preserving a large number of carriers. Yaji and co-workers show this is possible at room temperature using a germanium surface covered with a lead monolayer." @default.
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- W2026006976 date "2010-05-17" @default.
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- W2026006976 title "Large Rashba spin splitting of a metallic surface-state band on a semiconductor surface" @default.
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- W2026006976 doi "https://doi.org/10.1038/ncomms1016" @default.
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