Gapped Electronic Structure of Epitaxial Stanene on InSb(111)

ORAL

Abstract

Stanene (single-layer grey tin), with an electronic structure akin to that of graphene but exhibiting a much larger spin-orbit gap, offers a promising platform for room-temperature electronics based on the quantum spin Hall (QSH) effect. This material has received much theoretical attention, but a suitable substrate for stanene growth that results in an overall gapped electronic structure has been elusive; a sizable gap is necessary for room-temperature applications. Here, we report a study of stanene epitaxially grown on the (111)B face of indium antimonide (InSb). Angle-resolved photoemission spectroscopy (ARPES) measurements reveal a gap of 0.38 eV, in agreement with our first-principles calculations. The results indicate that stanene on InSb(111) is a strong contender for electronic QSH applications.

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Presenters

  • Joseph Hlevyack

    • Department of Physics, Univ of Illinois - Urbana

Authors

  • Caizhi Xu

    • Department of Physics, University of Illinois Urbana-Champaign
    • Department of Physics, Univ of Illinois - Urbana

  • Joseph Hlevyack

    • Department of Physics, Univ of Illinois - Urbana

  • Y -H Chan

    • Academia Sinica, Institute of Atomic and Molecular Sciences
    • Institute of Atomic and Molecular Sciences, Academia Sinica

  • Peng Chen

    • Lawrence Berkeley Natl Lab
    • Univ of Illinois - Urbana
    • Department of Physics, Univ of Illinois - Urbana

  • Xiaoxiong Wang

    • Department of Physics, Univ of Illinois - Urbana

  • David Flötotto

    • Univ of Illinois - Urbana
    • physics, Univ of Illinois - Urbana
    • Department of Physics, Univ of Illinois - Urbana

  • Guang Bian

    • Univ of Missouri - Columbia
    • University of Missouri
    • Princeton U.
    • Department of Physics and Astronomy, University of Missouri

  • Sung-Kwan Mo

    • Lawrence Berkeley National Lab
    • Lawrence Berkeley Natl Lab
    • Lawrence Berkeley National Laboratory
    • Pohang Accelerator Laboratory
    • Advanced Light Source, Lawrence Berkeley National Laboratory

  • Mei-Yin Chou

    • Institute of Atomic and Molecular Sciences, Academia Sinica

  • Tai-Chang Chiang

    • Department of Physics, University of Illinois Urbana-Champaign
    • Univ of Illinois - Urbana
    • physics, Univ of Illinois - Urbana
    • Univeristy of Illinois
    • Department of Physics, Univ of Illinois - Urbana