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Topological Weyl semimetals in the chiral antiferromagnetic materials Mn3Ge and Mn3Sn

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Yang,  Hao
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Sun,  Yan
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Zhang,  Yang
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Shi,  Wu-Jun
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Yan,  Binghai
Binghai Yan, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Yang, H., Sun, Y., Zhang, Y., Shi, W.-J., Parkin, S. S. P., & Yan, B. (2017). Topological Weyl semimetals in the chiral antiferromagnetic materials Mn3Ge and Mn3Sn. New Journal of Physics, 19: 015008, pp. 1-7. doi:10.1088/1367-2630/aa5487.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002C-B164-1
Abstract
Recent experiments revealed that Mn3Sn and Mn3Ge exhibit a strong anomalous Hall effect at room temperature, provoking us to explore their electronic structures for topological properties. By ab. initio band structure calculations, we have observed the existence of multiple Weyl points in the bulk and corresponding Fermi arcs on the surface, predicting antiferromagnetic Weyl semimetals in Mn3Ge and Mn3Sn. Here the chiral antiferromagnetism in the Kagome-type lattice structure is essential to determine the positions and numbers of Weyl points. Our work further reveals a new guiding principle to search for magnetic Weyl semimetals among materials that exhibit a strong anomalous Hall effect.