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Magnetic Weyl Semimetal Phase in a Kagome Crystal

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arxiv 1909.09580 v1 pith:POCFBXVH submitted 2019-09-20 cond-mat.mtrl-sci cond-mat.mes-hall

Magnetic Weyl Semimetal Phase in a Kagome Crystal

classification cond-mat.mtrl-sci cond-mat.mes-hall
keywords weylmagneticanomalouscharacteristicco3sn2s2crystaleffectelectronic
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Weyl semimetals are crystalline solids that host emergent relativistic Weyl fermions and have characteristic surface Fermi-arcs in their electronic structure. Weyl semimetals with broken time reversal symmetry are difficult to identify unambiguously. In this work, using angle-resolved photoemission spectroscopy, we visualized the electronic structure of the ferromagnetic crystal Co3Sn2S2 and discovered its characteristic surface Fermi-arcs and linear bulk band dispersions across the Weyl points. These results establish Co3Sn2S2 as a magnetic Weyl semimetal that may serve as a platform for realizing phenomena such as chiral magnetic effects, unusually large anomalous Hall effect and quantum anomalous Hall effect.

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