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  Observation of the critical state to multiple-type Dirac semimetal phases in KMgBi

Liu, D. F., Wei, L. Y., Le, C. C., Wang, H. Y., Zhang, X., Kumar, N., et al. (2021). Observation of the critical state to multiple-type Dirac semimetal phases in KMgBi. Journal of Applied Physics, 129(23): 235109, pp. 1-7. doi:10.1063/5.0045466.

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 Creators:
Liu, D. F.1, Author
Wei, L. Y.1, Author
Le, C. C.2, Author              
Wang, H. Y.1, Author
Zhang, X.1, Author
Kumar, N.2, Author              
Shekhar, C.3, Author              
Schröter, N. B. M.1, Author
Li, Y. W.1, Author
Pei, D.1, Author
Xu, L. X.1, Author
Dudin, P.1, Author
Kim, T. K.1, Author
Cacho, C.1, Author
Fujii, J.1, Author
Vobornik, I.1, Author
Wang, M. X.1, Author
Yang, L. X.1, Author
Liu, Z. K.1, Author
Guo, Y. F.1, Author
Hu, J. P.1, AuthorFelser, C.4, Author              Parkin, S. S. P.1, AuthorChen, Y. L.1, Author more..
Affiliations:
1External Organizations, ou_persistent22              
2Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
3Chandra Shekhar, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863428              
4Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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Free keywords: Bismuth alloys, Critical current density (superconductivity), Crystal structure, Electronic structure, Energy gap, Magnesium alloys, Magnesium metallography, Photoelectron spectroscopy, Potassium alloys, Scanning tunneling microscopy, Ternary alloys, Critical state, Dirac fermions, Flat band, Small bandgap, Systematic study, Bismuth metallography
 Abstract: Dirac semimetals are classified into different phases based on the types of Dirac fermions. Tuning the transition among different types of Dirac fermions in one system remains a challenge. Recently, KMgBi was predicted to be located at a critical state in which various types of Dirac fermions can be induced owing to the existence of a flatband. Here, we carried out systematic studies on the electronic structure of KMgBi single crystals by combining angle-resolve photoemission spectroscopy and scanning tunneling microscopy/spectroscopy. The flatband was clearly observed near the Fermi level. We also revealed a small bandgap of ∼20 meV between the flatband and the conduction band. These results demonstrate the critical states of KMgBi that transition among various types of Dirac fermions can be tuned in one system. © 2021 Author(s).

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Language(s): eng - English
 Dates: 2021-06-182021-06-18
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1063/5.0045466
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Title: Journal of Applied Physics
  Abbreviation : J. Appl. Phys.
Source Genre: Journal
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Publ. Info: New York, NY : AIP Publishing
Pages: - Volume / Issue: 129 (23) Sequence Number: 235109 Start / End Page: 1 - 7 Identifier: ISSN: 0021-8979
CoNE: https://pure.mpg.de/cone/journals/resource/991042723401880