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  Topological surface Fermi arcs in the magnetic Weyl semimetal Co3Sn2S2

Xu, Q., Liu, E., Shi, W., Muechler, L., Gayles, J., Felser, C., et al. (2018). Topological surface Fermi arcs in the magnetic Weyl semimetal Co3Sn2S2. Physical Review B, 97(23): 235416, pp. 1-8. doi:10.1103/PhysRevB.97.235416.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-9408-F Version Permalink: http://hdl.handle.net/21.11116/0000-0001-9428-B
Genre: Journal Article

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 Creators:
Xu, Qiunan1, Author              
Liu, Enke1, Author              
Shi, Wujun1, Author              
Muechler, Lukas2, Author
Gayles, Jacob1, Author              
Felser, C.3, Author              
Sun, Yan1, Author              
Affiliations:
1Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
2External Organizations, ou_persistent22              
3Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Abstract: Very recently, the half-metallic compound Co3Sn2S2 was proposed to be a magnetic Weyl semimetal (WSM) with Weyl points only 60 meV above the Fermi level E-F. Owing to the low charge carrier density and large Berry curvature induced, Co3Sn2S2 possesses both a large anomalous Hall conductivity and a large anomalous Hall angle, which provide strong evidence for the existence of Weyl points in Co3Sn2S2. In this work, we theoretically study the surface topological feature of Co3Sn2S2 and its counterpart Co3Sn2Se2. By cleaving the sample at the weak Sn-S/Se bonds, one can achieve two different surfaces terminated with Sn and S/Se atoms, respectively. The resulting Fermi-arc-related states can range from the energy of the Weyl points to E-F - 0.1 eV in the Sn-terminated surface. Therefore, it should be possible to observe the Fermi arcs in angle-resolved photoemission spectroscopy (ARPES) measurements. Furthermore, in order to simulate quasiparticle interference in scanning tunneling microscopy (STM) measurements, we also calculate the joint density of states for both terminals. This work should be helpful for a comprehensive understanding of the topological properties of these two magnetic WSMs and further ARPES and STM measurements.

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Language(s): eng - English
 Dates: 2018-06-112018-06-11
 Publication Status: Published in print
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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: 97 (23) Sequence Number: 235416 Start / End Page: 1 - 8 Identifier: ISSN: 1098-0121
CoNE: /journals/resource/954925225008