Computational search for magnetic topological materials in Eu compounds

ORAL

Abstract

Topological materials are of great interests for both basic research and future technology. Recent developments of symmetry indicators and similar approaches to diagnose band structure topology have resulted in databases of non-magnetic topological materials via high throughput band structure calculations. However, magnetic topological materials have been much less explored. One of the reasons is that the magnetic ground state structures are not readily available like crystallography databases and also different magnetic configurations can be competing in energy. But this also offers the opportunity to use magnetism to control topological properties of materials. Here we have explored Eu compounds using band structure calculations based on density functional theory and found several Eu compounds can host ferromagnetic Weyl, anti-ferromagnetic Dirac as well as anti-ferromagnetic topological insulating states depending on different magnetic configurations.

*This work is supported by the Center for Advancement of Topological Semimetals, an Energy Frontier Research Center funded by the US DOE Basic Energy Sciences, through the Ames Laboratory under Contract No. DE-AC02-07CH11358.

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Presenters

  • Lin-Lin Wang

    • Ames Lab
    • Ames Laboratory
    • Department of Physics and Astronomy, Iowa State University/Ames Laboratory

Authors

  • Lin-Lin Wang

    • Ames Lab
    • Ames Laboratory
    • Department of Physics and Astronomy, Iowa State University/Ames Laboratory

  • Robert-Jan Slager

    • Harvard
    • Department of Physics, Harvard University

  • Hoi Chun Po

    • Massachusetts Institute of Technology
    • MIT
    • Department of Physics, MIT
    • Department of Physics, Massachusetts Institute of Technology
    • Massachusetts Institute of Technology MIT

  • Adam Kaminski

    • Physics and Astronomy, Iowa State University
    • Ames Laboratory, Iowa State University
    • Department of Physics and Astronomy, Iowa State University/Ames Laboratory
    • Department of Physics and Astronomy, Iowa State University
    • Department of Physics and Astronomy, Ames Laboratory/Iowa State Univeristy
    • Iowa State University/Ames Laboratory

  • Ashvin Vishwanath

    • Harvard University
    • Physics, Harvard University
    • Department of Physics, Harvard University

  • Paul C Canfield

    • Iowa State University
    • Ames Laboratory and Iowa State University
    • Ames Lab
    • Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
    • Ames laboratory, Ames, IA
    • Ames Laboratory, Iowa State University
    • Department of Physics & Astronomy, Iowa State University/Ames Laboratory
    • Department of Physics and Astronomy, Iowa State University/Ames Laboratory
    • Iowa State University and Ames Laboratory
    • Iowa State University, Ames Laboratory
    • Department of Physics and Astronomy, Iowa State University
    • Division of Materials Sciences & Engineering, Ames Lab and Iowa State University
    • Department of Physics and Astronomy, Ames Laboratory/Iowa State Univeristy
    • Iowa State University/Ames Laboratory