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Giant out-of-plane spin component and the asymmetry of spin polarization in surface Rashba states of bismuth thin film



Giant out-of-plane spin component and the asymmetry of spin polarization in surface Rashba states of bismuth thin film



Physical Review Letters 106(16): 166401



We have performed high-resolution spin- and angle-resolved photoemission spectroscopy of bismuth thin film on Si(111) to investigate the spin structure of surface states. Unlike the conventional Rashba splitting, the magnitude of the in-plane spin polarization is asymmetric between the two elongated surface hole pockets across the zone center. Moreover, we uncovered a giant out-of-plane spin polarization as large as the in-plane counterpart which switches the sign across the Γ-M line. We discuss the present finding in terms of the symmetry breaking and the many-body effects.

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Accession: 053412667

Download citation: RISBibTeXText

PMID: 21599390

DOI: 10.1103/PhysRevLett.106.166401


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