Signature of type-II Weyl semimetal phase in MoTe2
Open accessAbstract
Topological Weyl semimetal (TWS), a new state of quantum matter, has sparked enormous research interest recently. Possessing unique Weyl fermions in the bulk and Fermi arcs on the surface, TWSs offer a rare platform for realizing many exotic physical phenomena. TWSs can be classified into type-I that respect Lorentz symmetry and type-II that do not. Here, we directly visualize the electronic structure of MoTe 2 , a recently proposed type-II TWS. Using angle-resolved photoemission spectroscopy (ARPES), we unravel the unique surface Fermi arcs, in good agreement with our ab initio calculations that have nontrivial topological nature. Our work not only leads to new understandings of the unusual properties discovered in this family of compounds, but also allows for the further exploration of exotic properties and practical applications of type-II TWSs, as well as the interplay between superconductivity (MoTe 2 was discovered to be superconducting recently) and their topological order.
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In MoTe2, there is a large trivial Fermi arc-like feature, but also small arcs that have been observed, which are consistent with being topological via band structure calculations.
“There is again the same large trivial Fermi arc-like feature, but also small arcs that have been observed, which are consistent with being topological via band structure calculations (Deng et al. , 2016; Jiang et al. , 2017; Tamai et al. , 2016).”
From Weyl and Dirac semimetals in three-dimensional solids (2018) · cites this paper as Jiang et al. , 2017
The Results section ('Surface Fermi arcs in Td-MoTe2'; page not provided) reports observed arcs whose shape and length agree with ab initio calculations, strongly supporting a topological origin. It also identifies a nearby, distinct surface state, but does not describe that state as a large, trivial Fermi arc-like feature. (LLM, conf=0.86)
Experimental — accuracy not yet measuredEvidence for a Type II state has been given in MoTe2, the alloy Mo_x W_{1-x} Te2, and TaIrTe4.
“Evidence for a Type II state has been given in MoTe 2 (Deng et al. , 2016; Huang et al. , 2016a; Jiang et al. , 2017; Liang et al. , 2016b; Tamai et al. , 2016), the alloy Mo x W 1 -x Te 2 (Belopolski et al. , 2016a,b) and TaIrTe 4 (Belopolski et al. , 2016d; Haubold et al. , 2017; Koepernik et al. , 2016).”
From Weyl and Dirac semimetals in three-dimensional solids (2018) · cites this paper as Jiang et al. , 2017
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Weyl and Dirac semimetals in three-dimensional solids
Armitage, N. P., Mele, E. J., & Vishwanath, A. (2018) · Reviews of Modern Physics · doi:10.1103/revmodphys.90.015001 · Cited by 4,528 · see citing works
“There is again the same large trivial Fermi arc-like feature, but also small arcs that have been observed, which are consistent with being topological via band structure calculations (Deng et al., 2016; Jiang et al., 2017; Tamai et al., 2016).”
BackgroundMethodEvidence of Topological Nodal-Line Fermions in ZrSiSe and ZrSiTe
Hu, J., Tang, Z., Liu, J., Liu, X., Zhu, Y., Graf, D., Myhro, K., Tran, S., Lau, C. N., Wei, J., et al. (2016) · Physical Review Letters · doi:10.1103/physrevlett.117.016602 · Cited by 483 · see citing works
Evidence for topological type-II Weyl semimetal WTe2
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Transport of Topological Semimetals
Hu, J., Xu, S.-Y., Ni, N., & Mao, Z. (2019) · Annual Review of Materials Research · doi:10.1146/annurev-matsci-070218-010023 · Cited by 265 · see citing works
Xu, Q., Liu, E., Shi, W., Muechler, L., Gayles, J., Felser, C., & Sun, Y. (2018) · Physical Review B · doi:10.1103/physrevb.97.235416 · Cited by 221 · see citing works
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Thirupathaiah, S., Jha, R., Pal, B., Matias, J. S., Das, P. K., Sivakumar, P. K., Vobornik, I., Plumb, N. C., Shi, M., Ribeiro, R. A., et al. (2017) · Physical Review B · doi:10.1103/physrevb.95.241105 · Cited by 56 · see citing works
Self-citationWeyl and Dirac Semimetals in Three Dimensional Solids
Armitage, N. P., Mele, E. J., & Vishwanath, A. (2017) · arXiv
“There is again the same large trivial Fermi arc-like feature, but also small arcs that have been observed, which are consistent with being topological via band structure calculations (Deng et al., 2016; Jiang et al., 2017; Tamai et al., 2016).”
BackgroundMethod
- Authors
- Jiang, J., Liu, Z. K., Sun, Y., Yang, H. F., Rajamathi, C. R., Qi, Y. P., Yang, L. X., Chen, C., Peng, H., Hwang, C.-C., Sun, S. Z., Mo, S.-K., Vobornik, I., Fujii, J., Parkin, S. S. P., Felser, C., Yan, B. H., & Chen, Y. L.
- Affiliations
- Pohang University of Science and Technology (KR)
- ShanghaiTech University (CN)
- Max Planck Institute for Chemical Physics of Solids (DE)
- Chinese Academy of Sciences (CN)
- Collaborative Innovation Center of Quantum Matter (CN)
- University of Oxford (GB)
- University of Science and Technology of China (CN)
- Lawrence Berkeley National Laboratory (US)
- Istituto Officina dei Materiali (IT)
- Max Planck Institute of Microstructure Physics (DE)
- Corresponding author
- Chen, Y.L.
- ORCID
- Venue
- Nature Communications
- Published
- 2017-01-13
- Volume
- 8
- Issue
- 1
- Pages
- 13973-13973
- ISSN
- 2041-1723 (ISSN-L)
- PMC
- PMC5241795
- OpenAlex
- W2321983756
- Cited by
- 452
- References
- 5
- Citations by year
- 2026: 16 · 2025: 24 · 2024: 25 · 2023: 36 · 2022: 35 · 2021: 72 · 2020: 75 · 2019: 57 · 2018: 60 · 2017: 44 · 2016: 8
- FWCI
- 31.65
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Nature Communications (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- eScholarship (California Digital Library) (submittedVersion, cc-by)
- OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion, cc-by)
- RePEc: Research Papers in Economics (submittedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- eScholarship (California Digital Library) (submittedVersion)
- Max Planck Digital Library (submittedVersion)
- MPG.PuRe (Max Planck Society) (submittedVersion)
- arXiv (Cornell University)
- Funders
- U.S. Department of Energy (-AC02-05CH11231, 05CH11231, DE AC02 05CH11231, DE-AC02-)
- Social Science Research Council
- Ministero dell’Istruzione, dell’Università e della Ricerca
- Engineering and Physical Sciences Research Council (EP/M020517/1, DE-AC02-05CH11231, Grant No EP/M020517/1, EP/M020517)
- FP7 Ideas: European Research Council (291472)
- 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
- type-II Weyl semimetal, MoTe2, Weyl semimetals, Weyl fermions, surface Fermi arcs, electronic structure, topological order, superconductivity, Lorentz violation
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