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Title: Elemental Topological Dirac Semimetal: α -Sn on InSb(111)

Journal Article · · Physical Review Letters
 [1];  [2];  [3];  [1];  [4];  [5];  [6];  [6];  [7];  [3];  [7];  [8];  [7];  [7];  [9]
  1. Univ. of Illinois, Urbana-Champaign, IL (United States). Dept. of Physics, Frederick Seitz Materials Research Lab.; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source
  2. Inst. of Atomic and Molecular Sciences, Taipei (Taiwan)
  3. Univ. of Toronto, ON (Canada). Dept. of Physics
  4. Univ. of Illinois, Urbana-Champaign, IL (United States). Dept. of Physics, Frederick Seitz Materials Research Lab.; Univ. of Science and Technology, Nanjing (China). College of Science
  5. European Synchrotron Radiation Facility (ESRF), Grenoble (France). Structure of Materials Group
  6. Univ. of Illinois, Urbana-Champaign, IL (United States). Dept. of Physics, Frederick Seitz Materials Research Lab.
  7. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source
  8. Inst. of Atomic and Molecular Sciences, Taipei (Taiwan); Georgia Inst. of Technology, Atlanta, GA (United States). School of Physics; National Taiwan Univ., Taipei (Taiwan). Dept. of Physics
  9. Univ. of Illinois, Urbana-Champaign, IL (United States). Dept. of Physics, Frederick Seitz Materials Research Lab.; National Taiwan Univ., Taipei (Taiwan). Dept. of Physics

Three-dimensional (3D) topological Dirac semimetals (TDSs) are rare but important as a versatile platform for exploring exotic electronic properties and topological phase transitions. A quintessential feature of TDSs is 3D Dirac fermions associated with bulk electronic states near the Fermi level. We have observed such bulk Dirac cones in epitaxially grown α-Sn films on InSb(111), the first such TDS system realized in an elemental form, using angle-resolved photoemission spectroscopy. First-principles calculations confirm that epitaxial strain is key to the formation of the TDS phase. A phase diagram is established that connects the 3D TDS phase through a singular point of a zero-gap semimetal phase to a topological insulator phase. The nature of the Dirac cone crosses over from 3D to 2D as the film thickness is reduced.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231; FG02-97ER45632; FG02-07ER46383
OSTI ID:
1379797
Alternate ID(s):
OSTI ID: 1349973
Journal Information:
Physical Review Letters, Vol. 118, Issue 14; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 84 works
Citation information provided by
Web of Science

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Cited By (15)

Thermal Stability Enhancement in Epitaxial Alpha Tin Films by Strain Engineering journal August 2019
Electronic Band Engineering in Elemental 2D Materials journal August 2018
Growth and Magnetotransport in Thin‐Film α‐Sn on CdTe journal September 2019
The Xenes Generations: A Taxonomy of Epitaxial Single‐Element 2D Materials journal September 2019
Composite topological nodal lines penetrating the Brillouin zone in orthorhombic AgF2 journal April 2019
A case study for the formation of stanene on a metal surface journal February 2019
Nonlayered tellurene as an elemental 2D topological insulator: experimental evidence from scanning tunneling spectroscopy journal January 2019
Dirac–Weyl semimetal phase in noncentrosymmetric transition metal monochalcogenides MoTe and WTe journal January 2019
Dielectric function and band structure of Sn 1− x Ge x ( x  < 0.06) alloys on InSb journal February 2019
Phase transition studies of Na 3 Bi system under uniaxial strain journal February 2018
Epitaxial growth and electronic properties of few-layer stanene on InSb (1 1 1) journal October 2019
Angular-resolved photoemission electron spectroscopy and transport studies of the elemental topological insulator α -Sn journal November 2018
Quantum Spin Hall Insulators in Tin Films: Beyond Stanene journal December 2019
The Xenes Generations: A Taxonomy of Epitaxial Single‐Element 2D Materials journal September 2019
A case study for the formation of stanene on a metal surface text January 2019

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