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  Signatures for half-metallicity and nontrivial surface states in the kagome lattice Weyl semimetal Co3Sn2S2

Jiao, L., Xu, Q., Cheon, Y., Sun, Y., Felser, C., Liu, E., et al. (2019). Signatures for half-metallicity and nontrivial surface states in the kagome lattice Weyl semimetal Co3Sn2S2. Physical Review B, 99(24): 245158, pp. 1-6. doi:10.1103/PhysRevB.99.245158.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0004-82D8-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-BE7A-E
Genre: Journal Article

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 Creators:
Jiao, Lin1, Author              
Xu, Qiunan2, Author              
Cheon, Yeryun1, Author              
Sun, Yan2, Author              
Felser, Claudia3, Author              
Liu, Enke4, Author
Wirth, Steffen5, Author              
Affiliations:
1Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              
2Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
3Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              
4External Organizations, ou_persistent22              
5Steffen Wirth, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863460              

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 Abstract: Weyl semimetals with time-reversal symmetry breaking are expected to show various fascinating physical behaviors, such as intrinsic giant anomalous Hall effect, chiral anomaly effect in the bulks, and Fermi arcs on the surfaces. Here we report a scanning tunneling microscopy study on the magnetic Weyl semimetal candidate Co3Sn2S2. According to the morphology and local density of states of the surface, we provide assignments to different surface terminations. The measured local density of states reveals a semimetal gap of similar to 300 mV, which is further verified as the gap in spin-minority bands using spin-resolved tunneling spectra. Additionally, signature for the nontrivial surface states around 50 mV is proposed. This is further confirmed by the observations of standing waves around a step edge of the sample. Our observations and their comparison with band-structure calculations provide direct yet timely evidence for the bulk and surface band structures of the magnetic Weyl semimetal candidate Co3Sn2S2.

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Language(s): eng - English
 Dates: 2019-06-282019-06-28
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1103/PhysRevB.99.245158
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 99 (24) Sequence Number: 245158 Start / End Page: 1 - 6 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008