Spin-polarized quasi-one-dimensional state with finite band gap on the Bi/InSb(001) surface

J. Kishi, Y. Ohtsubo, T. Nakamura, K. Yaji, A. Harasawa, F. Komori, S. Shin, J. E. Rault, P. Le Fèvre, F. Bertran, A. Taleb-Ibrahimi, M. Nurmamat, H. Yamane, S. Ideta, K. Tanaka, and S. Kimura
Phys. Rev. Materials 1, 064602 – Published 10 November 2017
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Abstract

One-dimensional (1D) electronic states were discovered on the 1D surface atomic structure of Bi fabricated on semiconductor InSb(001) substrates by angle-resolved photoelectron spectroscopy (ARPES). The 1D state showed steep, Dirac-cone-like dispersion along the 1D atomic structure with a finite direct band gap opening as large as 150 meV. Moreover, spin-resolved ARPES revealed the spin polarization of the 1D unoccupied states as well as that of the occupied states, the orientation of which inverted depending on the wave-vector direction parallel to the 1D array on the surface. These results reveal that a spin-polarized quasi-1D carrier was realized on the surface of 1D Bi with highly efficient backscattering suppression, showing promise for use in future spintronics and energy-saving devices.

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  • Received 18 April 2017

DOI:https://doi.org/10.1103/PhysRevMaterials.1.064602

©2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

J. Kishi1, Y. Ohtsubo2,1,*, T. Nakamura1, K. Yaji3, A. Harasawa3, F. Komori3, S. Shin3, J. E. Rault4, P. Le Fèvre4, F. Bertran4, A. Taleb-Ibrahimi4,5, M. Nurmamat6, H. Yamane7, S. Ideta7, K. Tanaka7, and S. Kimura2,1,†

  • 1Department of Physics, Graduate School of Science, Osaka University, Toyonaka 560-0043, Japan
  • 2Graduate School of Frontier Biosciences, Osaka University, Suita 565-0871, Japan
  • 3Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
  • 4Synchrotron SOLEIL, Saint-Aubin-BP 48, F-91192 Gif sur Yvette, France
  • 5UR1/CNRS Synchrotron SOLEIL, Saint-Aubin, F-91192 Gif sur Yvette, France
  • 6Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
  • 7Institute for Molecular Science, Okazaki 444-8585, Japan

  • *y_oh@fbs.osaka-u.ac.jp
  • kimura@fbs.osaka-u.ac.jp

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Issue

Vol. 1, Iss. 6 — November 2017

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