Electronic Properties of the Weyl Semimetals Co2MnX (X=Si, Ge, Sn)
Corresponding Author
Abhishek Sharan
Department of Physics and Astronomy, University of Delaware, Newark, DE, 19716 USA
Department of Materials Science and Engineering, University of Delaware, Newark, DE, 19716 USA
Search for more papers by this authorFelipe Crasto de Lima
Department of Materials Science and Engineering, University of Delaware, Newark, DE, 19716 USA
Ilum School of Science, CNPEM, 13083-970 Campinas, Sao Paulo, Brazil
Search for more papers by this authorShoaib Khalid
Department of Physics and Astronomy, University of Delaware, Newark, DE, 19716 USA
Department of Materials Science and Engineering, University of Delaware, Newark, DE, 19716 USA
Department of Physics, School of Natural Sciences (SNS), National University of Science and Technology (NUST), Islamabad, 44000 Pakistan
Search for more papers by this authorRoberto H. Miwa
Instituto de Fisica, Universidade Federal de Uberlandia, C.P. 593, 38400-902 Uberlandia, MG, Brazil
Search for more papers by this authorAnderson Janotti
Department of Physics and Astronomy, University of Delaware, Newark, DE, 19716 USA
Department of Materials Science and Engineering, University of Delaware, Newark, DE, 19716 USA
Search for more papers by this authorCorresponding Author
Abhishek Sharan
Department of Physics and Astronomy, University of Delaware, Newark, DE, 19716 USA
Department of Materials Science and Engineering, University of Delaware, Newark, DE, 19716 USA
Search for more papers by this authorFelipe Crasto de Lima
Department of Materials Science and Engineering, University of Delaware, Newark, DE, 19716 USA
Ilum School of Science, CNPEM, 13083-970 Campinas, Sao Paulo, Brazil
Search for more papers by this authorShoaib Khalid
Department of Physics and Astronomy, University of Delaware, Newark, DE, 19716 USA
Department of Materials Science and Engineering, University of Delaware, Newark, DE, 19716 USA
Department of Physics, School of Natural Sciences (SNS), National University of Science and Technology (NUST), Islamabad, 44000 Pakistan
Search for more papers by this authorRoberto H. Miwa
Instituto de Fisica, Universidade Federal de Uberlandia, C.P. 593, 38400-902 Uberlandia, MG, Brazil
Search for more papers by this authorAnderson Janotti
Department of Physics and Astronomy, University of Delaware, Newark, DE, 19716 USA
Department of Materials Science and Engineering, University of Delaware, Newark, DE, 19716 USA
Search for more papers by this authorAbstract
Using first-principles electronic structure calculations, it is shown that ferromagnetic Heusler compounds Co2MnX (X = Si, Ge, Sn) present nontrivial topological characteristics and belong to the category of Weyl semimetals. These materials exhibit two topologically interesting band crossings near the Fermi level. These band crossings have complex 3D geometries in the Brillouin zone and are characterized by nontrivial topology as Hopf links and chain-like nodal lines that are protected by the perpendicular mirror planes. The spin–orbit interaction split these nodal lines into several 0D Weyl band crossings. Unlike previously known topologically nontrivial Heusler materials, these majority spin band crossings lie in or very near to the bandgap of minority spin bands, potentially facilitating experimental observation.
Conflict of Interest
The authors declare no conflict of interest.
Open Research
Data Availability Statement
The data that support the findings of this study are available from the corresponding author upon reasonable request.
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