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This content will become publicly available on January 11, 2019

Title: Gapped electronic structure of epitaxial stanene on InSb(111)

We report that stanene (single-layer gray 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 measurements reveal a gap of 0.44 eV, in agreement with our first-principles calculations. Lastly, the results indicate that stanene on InSb(111) is a strong contender for electronic QSH applications.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ;  [4] ;  [4] ;  [5] ;  [6] ;  [7] ;  [8]
  1. Univerisity of Illinois at Urbana-Champaign, Urbana, IL (United States). Department of Physics and Frederick Seitz Materials Research Laboratory; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  2. Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei (Taiwan)
  3. Univerisity of Illinois at Urbana-Champaign, Urbana, IL (United States). Department of Physics and Frederick Seitz Materials Research Laboratory; Nanjing University of Science and Technology (China). College of Science
  4. Univerisity of Illinois at Urbana-Champaign, Urbana, IL (United States). Department of Physics and Frederick Seitz Materials Research Laboratory
  5. Univ. of Missouri, Columbia, MO (United States). Department of Physics and Astronomy
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  7. Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei (Taiwan); Georgia Inst. of Technology, Atlanta, GA (United States). School of Physics; National Taiwan University, Taipei (Taiwan). Department of Physics
  8. Univerisity of Illinois at Urbana-Champaign, Urbana, IL (United States). Department of Physics and Frederick Seitz Materials Research Laboratory; National Taiwan University, Taipei (Taiwan). Department of Physics
Publication Date:
Grant/Contract Number:
AC02-05CH11231; FG02-07ER46383
Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 97; Journal Issue: 3; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Research Org:
Univerisity of Illinois at Urbana-Champaign, Urbana, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE
Contributing Orgs:
Advanced Light Source, Lawrence Berkeley National Laboratory (LBNL)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1416710
Alternate Identifier(s):
OSTI ID: 1416628