Fermi-arc diversity on surface terminations of the magnetic Weyl semimetal Co<sub>3</sub>Sn<sub>2</sub>S<sub>2</sub>
ORAL
Abstract
Bulk–surface correspondence in Weyl semimetals ensures the formation of topological “Fermi arc” surface bands whose existence is guaranteed by bulk Weyl nodes. By investigating three distinct surface terminations of the ferromagnetic semimetal Co3Sn2S2, we verify spectroscopically its classification as a time-reversal symmetry-broken Weyl semimetal. We show that the distinct surface potentials imposed by three different terminations modify the Fermi-arc contour and Weyl node connectivity. On the tin (Sn) surface, we identify intra–Brillouin zone Weyl node connectivity of Fermi arcs, whereas on cobalt (Co) termination, the connectivity is across adjacent Brillouin zones. On the sulfur (S) surface, Fermi arcs overlap with nontopological bulk and surface states. We thus resolve both topologically protected and nonprotected electronic properties of a Weyl semimetal.
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Presenters
Nurit Avraham
Weizmann Institute of Science
Authors
Nurit Avraham
Weizmann Institute of Science
Noam Morali
Weizmann Institute of Science
Pranab Kumar Nag
Weizmann Institute of Science
Rajib Batabyal
Weizmann Institute of Science
Liu Enke
Beijing National Laboratory
Qiunan Xu
Max Planck Institute for Chemical Physics of Solids
Max Planck Dresden
Yan Sun
Max Planck Institute for Chemical Physics of Solids
Max Planck Dresden
binghai yan
Department of Condensed Matter Physics, Weizmann Institute of Science
Weizmann Institute of Science
Weizmann institute of science
Claudia Felser
Max Planck Institute for Chemical Physics of Solids
MPI-CPfS Dresden
Max Planck Institute For Chemical and Physical Solids
MPI for chemical physics of solids, Dresden
Solid State Chemistry, Max Planck Institute Chemical Physics of Solids
Max Planck Institute
Max-Planck-Institute for Chemical Physics of Solids , Nöthnitzer Straße-40, 01187 Dresden, Germany
