Fermi-arc diversity on surface terminations of the magnetic Weyl semimetal Co3Sn2S2
Bulk-surface correspondence in Weyl semimetals assures 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 class...
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| creator | Morali, Noam Batabyal, Rajib Nag, Pranab Kumar Liu, Enke Xu, Qiunan Sun, Yan Binghai Yan Felser, Claudia Avraham, Nurit Beidenkopf, Haim |
| description | Bulk-surface correspondence in Weyl semimetals assures 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 Sn surface we identify intra-Brillouin zone Weyl node connectivity of Fermi-arcs, while on Co termination the connectivity is across adjacent Brillouin zones. On the S surface Fermi-arcs overlap with non-topological bulk and surface states that ambiguate their connectivity and obscure their exact identification. By these we resolve the topologically protected electronic properties of a Weyl semimetal and its unprotected ones that can be manipulated and engineered. |
| doi_str_mv | 10.48550/arxiv.1903.00509 |
| format | Article |
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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 Sn surface we identify intra-Brillouin zone Weyl node connectivity of Fermi-arcs, while on Co termination the connectivity is across adjacent Brillouin zones. On the S surface Fermi-arcs overlap with non-topological bulk and surface states that ambiguate their connectivity and obscure their exact identification. 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| subjects | Brillouin zones Connectivity Ferromagnetism Metalloids Physics - Mesoscale and Nanoscale Physics Physics - Other Condensed Matter |
| title | Fermi-arc diversity on surface terminations of the magnetic Weyl semimetal Co3Sn2S2 |
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