Quantum spin Hall state in monolayer 1T'-WTe2
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A rhombohedral 1T phase with ABC stacking is unstable and spontaneously distorts to the 1T' phase, which leads to a quantum spin Hall insulator state in the presence of spin-orbit coupling.
“For a rhombohedral 1T phase with ABC stacking (Figure 10e), the structure is unstable and undergoes a spontaneous lattice distortion to the 1T phase (Figure 10f ), which consequently leads to a QSHI state in the presence of SOC (72).”
From Transport of Topological Semimetals (2019) · cites this paper as [72]
The quantum spin Hall insulator state has been proposed in monolayer 1T'-transition metal dichalcogenides MX2 (M = W, Mo; X = S, Se, Te) and in WHM.
“The QSHI state has been proposed in the monolayer form of the layered 1T -transition metal dichalcogenides MX 2 (M = W, Mo; X = S, Se, Te) (72) and WHM (322).”
From Transport of Topological Semimetals (2019) · cites this paper as [72]
The high temperature at which the conductance plateau develops in WTe2 monolayer is ascribed to the large bulk band gap of the 1T'-WTe2 monolayer.
“and could be ascribed to the large bulk band gap of the 1T -WTe 2 monolayer [which was predicted to be 100 meV (72) and found to be 55 ± 20 meV for MBE-grown samples (73)].”
From Transport of Topological Semimetals (2019) · cites this paper as [72]
The bulk band gap of 1T'-WTe2 monolayer was predicted to be 100 meV and measured as 55 ± 20 meV for MBE-grown samples.
“[which was predicted to be 100 meV (72) and found to be 55 ± 20 meV for MBE-grown samples (73)].”
From Transport of Topological Semimetals (2019) · cites this paper as [72]
The gap closing caused by the electric field leads to a topological phase transition to a trivial phase.
“Such gap closing leads to a topological phase transition to a trivial phase; this transition occurs very rapidly and can thus be used for topological field effect transistors (72).”
From Transport of Topological Semimetals (2019) · cites this paper as [72]
The discussion of Figure 1 (section labeled Abstract; page unavailable) describes a lattice-distortion-driven transition from a trivial to a nontrivial phase, followed by a gap opening due to spin-orbit coupling. Searches for electric-field-induced gap closing and rapid transistor switching found no passage addressing the claimed transition to a trivial phase. (LLM, conf=0.76)
Experimental — accuracy not yet measured
Under one proposal, a horizontal electric field may break inversion symmetry and induce strong Rashba splitting near the Fermi level, closing the bulk gap at some critical electric fields.
“Furthermore, under one proposal, the horizontal electric field may break the inversion symmetry and may induce strong Rashba splitting of the bands near E F , which closes the bulk gap at some critical electric fields.”
From Transport of Topological Semimetals (2019) · cites this paper as [72]
The band-structure passage (section labelled Abstract; page unavailable) attributes symmetry breaking to lattice distortion and bulk-gap opening to spin–orbit coupling. Searches for electric fields, Rashba splitting, and critical-field gap closure found no passage addressing the proposed field-induced mechanism. The reported gap under the studied conditions does not contradict a possible closure under an applied field. (LLM, conf=0.76)
Experimental — accuracy not yet measured
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- Authors
- Tang, S., Zhang, C., Wong, D., Pedramrazi, Z., Tsai, H.-Z., Jia, C., Moritz, B., Claassen, M., Ryu, H., Kahn, S., Jiang, J., Yan, H., Hashimoto, M., Lu, D., Moore, R. G., Hwang, C.-C., Hwang, C., Hussain, Z., Chen, Y., Ugeda, M. M., Liu, Z., Xie, X., Devereaux, T. P., Crommie, M. F., Mo, S.-K., & Shen, Z.-X.
- Affiliations
- Lawrence Berkeley National Laboratory (US)
- SLAC National Accelerator Laboratory (US)
- University of California, Berkeley (US)
- Pohang University of Science and Technology (KR)
- University of Oxford (GB)
- Ikerbasque (ES)
- Chinese Academy of Sciences (CN)
- Corresponding author
- Mo, Sung-Kwan
- Shen, Zhi-Xun
- ORCID
- Tang, Shujie
- Zhang, Chaofan
- Wong, Dillon
- Tsai, Hsin-Zon
- Jia, Chunjing
- Moritz, Brian
- Claassen, Martin
- Ryu, Hyejin
- Kahn, Salman
- Jiang, Juan
- Yan, Hao
- Hashimoto, Makoto
- Lu, Donghui
- Moore, Robert G.
- Hwang, Chan-Cuk
- Hwang, Choongyu
- Hussain, Zahid
- Chen, Yulin
- Ugeda, Miguel M.
- Liu, Zhi
- Xie, Xiaoming
- Devereaux, Thomas P.
- Crommie, Michael F.
- Mo, Sung-Kwan
- Shen, Zhi-Xun
- Venue
- Nature Physics
- Published
- 2017-06-26
- Volume
- 13
- Issue
- 7
- Pages
- 683-687
- ISSN
- 1745-2473 (ISSN-L)
- 1745-2481
- OpenAlex
- W2629641710
- Cited by
- 846
- References
- 33
- Citations by year
- 2026: 49 · 2025: 87 · 2024: 101 · 2023: 96 · 2022: 101 · 2021: 120 · 2020: 117 · 2019: 102 · 2018: 64 · 2017: 9
- FWCI
- 39.30
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Nature Physics (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
- eScholarship (California Digital Library) (submittedVersion)
- arXiv (Cornell University)
- Funders
- National Science Foundation (DEAC02-05CH11231, 1542741, 11227902)
- U.S. Department of Energy (-AC02-05CH11231, Contract No. DE-AC02-05-CH11231, 76SF00515, DE–AC02–76SF00515, 05CH11231, No. DE-AC02-05-CH11231, FA9550-14-1-0277, DE AC02 05CH11231, AC02‐76SF00515, No. DE-AC02–76SF00515, Contract No. DE-AC02-76SF00515, KCWF16, DE-AC02-)
- University of Washington
- National Energy Research Scientific Computing Center (DE–AC02–05CH11231, 05CH11231, AC02-05CH11231, Contract No. DE-AC02-05CH11231)
- National Natural Science Foundation of China (11227902, DE-AC02-05CH11231)
- Pohang University of Science and Technology (2011-0031558)
- Office of Science (AC02-76SF00515, No. DE-AC02- 05-CH11231, KCWF16, DEAC02–05CH11231, AC02-05CH11231, DE-AC02-76SF0051 5, DE-AC02, Contract No. DE-AC02-05CH11231, 76SF00515)
- Basic Energy Sciences (DE-AC02, Contract No. DE-AC02-05-CH11231, KCWF16, DE-AC02-05CH11231., No. DE-AC02-05-CH11231, AC02–05CH11231, 76SF00515, Contract No. DE-AC02-76SF00515, AC02-76SF00515, DE-AC-02-76SF00515)
- Air Force Office of Scientific Research (FA9550-, DE-AC02-05CH11231, FA9550‐14‐1‐0277)
- Topics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Topological Materials and Phenomena
- Physical Sciences › Materials Science › Materials Chemistry › 2D Materials and Applications
- Physical Sciences › Physics and Astronomy › Condensed Matter Physics › Advanced Condensed Matter Physics
- Keywords
- quantum spin Hall insulator, transition metal dichalcogenides, topological band inversion, spin-orbit coupling, Hall conductance quantization, two-dimensional materials, electronic band structure, epitaxial monolayers
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