Topological surface Fermi arcs in the magnetic Weyl semimetal Co3Sn2 S2

Xu Q, Liu E, Shi W, Muechler L, Gayles J, Felser C, Sun Y (2018)

Publication Type: Journal article

Publication year: 2018

Journal

Physical Review B American Physical Society

Book Volume: 97

Article Number: 235416

Journal Issue: 23

DOI: 10.1103/PhysRevB.97.235416

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 EF. 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 EF-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.

Involved external institutions

Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE) Princeton University US United States (USA) (US)

How to cite

APA:

Xu, Q., Liu, E., Shi, W., Muechler, L., Gayles, J., Felser, C., & Sun, Y. (2018). Topological surface Fermi arcs in the magnetic Weyl semimetal Co3Sn2 S2. Physical Review B, 97(23). https://doi.org/10.1103/PhysRevB.97.235416

MLA:

Xu, Qiunan, et al. "Topological surface Fermi arcs in the magnetic Weyl semimetal Co3Sn2 S2." Physical Review B 97.23 (2018).

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