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Cited by 75Topological Materials and Phenomena2D Materials and ApplicationsAdvanced Condensed Matter Physics

Observation of nodal line in non-symmorphic topological semimetal InBi

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Ekahana, Sandy Adhitia, Wu, Shu-Chun, Jiang, Juan, Okawa, Kenjiro, Prabhakaran, Dharmalingam, Hwang, Chan-Cuk, Mo, Sung-Kwan, Sasagawa, Takao +4 more·2017·New Journal of Physics
DOI 10.1088/1367-2630/aa75a1
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Abstract

Topological nodal semimetal (TNS), characterized by its touching conduction and valence bands, is a newly discovered state of quantum matter which exhibits various exotic physical phenomena. Recently, a new type of TNS called topological nodal line semimetal (TNLS) is predicted where its conduction and valence band form a degenerate one-dimension line which is further protected by its crystal symmetry. In this work, we systematically investigated the bulk and surface electronic structure of the non-symmorphic, TNLS in InBi (which is also a type II Dirac semimetal) with strong spin–orbit coupling by using angle resolved photoemission spectroscopy. By tracking the crossing points of the bulk bands at the Brillouin zone boundary, we discovered the nodal-line feature along the direction, in agreement with the ab initio calculations and confirmed it to be a new compound in the TNLS family. Our discovery provides a new material platform for the study of these exotic topological quantum phases and paves the way for possible future applications.

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  • A 1D closed loop interlinking the nodal line has a fully gapped band structure and allows definition of a winding number.

    “We consider a 1D closed loop that interlinks the nodal line in k space (Figure 1c).The band structure is fully gapped and therefore allows for the definition of a topological invariant, i.e., the winding number (150).”

    From Transport of Topological Semimetals (2019) · cites this paper as [150]

    Section 1.2 describes nodal lines as one-dimensional band crossings, and Section 2.1 discusses InBi’s topology, but neither addresses a gapped closed loop interlinking a nodal line or a winding number defined on that loop. Searches for those terms and for a topological invariant on an enclosing loop found no passage supporting the attributed claim. No page numbers were provided in our copy. (LLM, conf=0.76)

    Experimental — accuracy not yet measured

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Authors
Ekahana, S. A., Wu, S.-C., Jiang, J., Okawa, K., Prabhakaran, D., Hwang, C.-C., Mo, S.-K., Sasagawa, T., Felser, C., Yan, B., Liu, Z., & Chen, Y.
Affiliations
  • University of Oxford (GB)
  • Max Planck Institute for Chemical Physics of Solids (DE)
  • Pohang University of Science and Technology (KR)
  • Tokyo Institute of Technology (JP)
  • Lawrence Berkeley National Laboratory (US)
  • ShanghaiTech University (CN)
ORCID
Venue
New Journal of Physics
Publisher
IOP Publishing
Published
2017-06-28
Volume
19
Issue
6
Pages
065007
ISSN
1367-2630 (ISSN-L)
DOI
10.1088/1367-2630/aa75a1
OpenAlex
W2733298404
Cited by
75
References
8
Citations by year
2026: 5 · 2025: 9 · 2024: 8 · 2023: 7 · 2022: 6 · 2021: 9 · 2020: 10 · 2019: 11 · 2018: 8 · 2017: 1 · 2016: 1
FWCI
4.02
Type
journal article
Language
en
Open access
Licence
Locations
  • New Journal of Physics (publishedVersion, cc-by)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • U.S. Department of Energy (-AC02-05CH11231, 05CH11231, DE AC02 05CH11231, DE-AC02-)
  • Social Science Research Council
  • Lembaga Pengelola Dana Pendidikan
  • Engineering and Physical Sciences Research Council (EP/M020517/1, DE-AC02-05CH11231, Grant No EP/M020517/1, EP/M020517)
  • Japan Society for the Promotion of Science (16H03847)
  • 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
topological nodal-line semimetal, InBi, type-II Dirac semimetal, spin-orbit coupling, surface electronic structure, bulk band structure, Brillouin zone boundary, topological quantum phases

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