Giant Rashba splitting of quasi-one-dimensional surface states on Bi/InAs(110)-(2×1)

Takuto Nakamura, Yoshiyuki Ohtsubo, Yuki Yamashita, Shin-ichiro Ideta, Kiyohisa Tanaka, Koichiro Yaji, Ayumi Harasawa, Shik Shin, Fumio Komori, Ryu Yukawa, Koji Horiba, Hiroshi Kumigashira, and Shin-ichi Kimura
Phys. Rev. B 98, 075431 – Published 27 August 2018

Abstract

Electronic states of the Bi/InAs(110)-(2×1) surface and its spin-polarized structure are revealed by angle-resolved photoelectron spectroscopy (ARPES), spin-resolved ARPES, and density-functional-theory calculation. The surface electronic state showed quasi-one-dimensional (Q1D) dispersion curves and a nearly metallic character; the top of the holelike band is just below the Fermi level. The size of the Rashba parameter αR reached a much larger value (5.5 eVÅ) than for previously reported 1D systems. The present result will provide a fertile playground for further studies of the exotic electronic phenomena in 1D or Q1D systems with the spin-split electronic states as well as for advanced spintronic devices.

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  • Received 18 April 2018

DOI:https://doi.org/10.1103/PhysRevB.98.075431

©2018 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Takuto Nakamura1, Yoshiyuki Ohtsubo1,2,*, Yuki Yamashita1, Shin-ichiro Ideta3, Kiyohisa Tanaka3, Koichiro Yaji4, Ayumi Harasawa4, Shik Shin4, Fumio Komori4, Ryu Yukawa5, Koji Horiba5, Hiroshi Kumigashira5, and Shin-ichi Kimura1,2,†

  • 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 Molecular Science, Okazaki 444-8585, Japan
  • 4Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
  • 5Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba 305-0801, Japan

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

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Issue

Vol. 98, Iss. 7 — 15 August 2018

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