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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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Xu, Qiunan1, Autor           
Liu, Enke1, Autor           
Shi, Wujun1, Autor           
Muechler, Lukas2, Autor
Gayles, Jacob1, Autor           
Felser, C.3, Autor           
Sun, Yan1, Autor           
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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 Zusammenfassung: 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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Sprache(n): eng - English
 Datum: 2018-06-112018-06-11
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
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 Identifikatoren: ISI: 000434761900013
DOI: 10.1103/PhysRevB.97.235416
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Titel: Physical Review B
  Kurztitel : Phys. Rev. B
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Woodbury, NY : American Physical Society
Seiten: - Band / Heft: 97 (23) Artikelnummer: 235416 Start- / Endseite: 1 - 8 Identifikator: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008