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Title: Realizing an Epitaxial Decorated Stanene with an Insulating Bandgap

The exploration of intriguing topological quantum physics in stanene has attracted enormous interest but is challenged by lacking desirable material samples. The successful fabrication of monolayer stanene on PbTe(111) films with low-temperature molecular beam epitaxy and thorough characterizations of its atomic and electronic structures are reported here. In situ angle-resolved photoemission spectroscopy together with first-principles calculations identify two hole bands of p xy orbital with a spin-orbit coupling induced band splitting and meanwhile reveal an automatic passivation of p z orbital of stanene. Importantly, material properties are tuned by substrate engineering, realizing a decorated stanene sample with truly insulating bulk on Sr-doped PbTe. In conclusion, this finding paves a road for studies of stanene-based topological quantum effects and electronics.
Authors:
 [1] ;  [2] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [3] ;  [3] ;  [3] ;  [3] ;  [4] ; ORCiD logo [3] ;  [3] ;  [5] ;  [3]
  1. Tsinghua Univ., Beijing (China). State Key Lab. of Low Dimensional Quantum Physics, Dept. of Physics
  2. Tsinghua Univ., Beijing (China). State Key Lab. of Low Dimensional Quantum Physics, Dept. of Physics; National Univ. of Defense Technology, Changsha (China). College of Optoelectronic Science and Engineering
  3. Tsinghua Univ., Beijing (China). State Key Lab. of Low Dimensional Quantum Physics, Dept. of Physics; Collaborative Innovation Center of Quantum Matter, Beijing (China)
  4. Tsinghua Univ., Beijing (China). State Key Lab. of Low Dimensional Quantum Physics, Dept. of Physics; RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama (Japan); Collaborative Innovation Center of Quantum Matter, Beijing (China)
  5. Stanford Univ., CA (United States). Dept. of Physics
Publication Date:
Grant/Contract Number:
51661135024; 2017YFA0303303; AC02-76SF00515
Type:
Accepted Manuscript
Journal Name:
Advanced Functional Materials
Additional Journal Information:
Journal Volume: 28; Journal Issue: 35; Journal ID: ISSN 1616-301X
Publisher:
Wiley
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Natural Science Foundation of China (NNSFC); Ministry of Science and Technology of China; Beijing Advanced Innovation Center for Future Chip (ICFC); Tsinghua University Initiative Scientific Research Program; National Thousand‐Young‐Talents Program
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; insulating bandgaps; molecular beam epitaxy; stanene
OSTI Identifier:
1475572
Alternate Identifier(s):
OSTI ID: 1458580