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Search: WFRF:(Miki Kazushi)

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1.
  • Annese, Emilia, et al. (author)
  • Nonvortical Rashba Spin Structure on a Surface with C1h Symmetry
  • 2016
  • In: Physical Review Letters. - 0031-9007. ; 117:1
  • Journal article (peer-reviewed)abstract
    • A totally anisotropic peculiar Rashba-Bychkov (RB) splitting of electronic bands was found on the Tl/Si(110)-(1×1) surface with C1h symmetry by angle- and spin-resolved photoelectron spectroscopy and first-principles theoretical calculation. The constant energy contour of the upper branch of the RB split band has a warped elliptical shape centered at a k point located between Γ and the edge of the surface Brillouin zone, i.e., at a point without time-reversal symmetry. The spin-polarization vector of this state is in-plane and points almost the same direction along the whole elliptic contour. This novel nonvortical RB spin structure is confirmed as a general phenomenon originating from the C1h symmetry of the surface.
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2.
  • Sakamoto, Kazuyuki, et al. (author)
  • Electronic structure of the Si(110)-(16×2) surface : High-resolution ARPES and STM investigation
  • 2009
  • In: Physical Review B. Condensed Matter and Materials Physics. - 1098-0121 .- 1550-235X. ; 79:4, s. 045304-
  • Journal article (peer-reviewed)abstract
    • The electronic structure of a single domain Si(110)-(16×2) surface has been investigated by high-resolution angle-resolved photoelectron spectroscopy and scanning tunneling microscopy (STM). Four semiconducting surface states with flat dispersions, whose binding energies are 0.2, 0.4, 0.75, and 1.0 eV, were observed in the bulk band gap and more than six states were observed within the projected bulk band at binding energies less than 5.2 eV. The origins of the four surface states and of one state at a binding energy of approximately 1.5 eV at the Γ̅ point are discussed based on the local density of states mappings obtained by STM. Further, a structural model that can explain all these five states is proposed.
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