Magnetic structure of Weyl semi-metal candidate Mn<sub>3</sub>Sn

ORAL

Abstract

The interplay between frustrated magnetism and itinerant electrons can give rise to topogical non-trivial properties such as anomalous Hall and Nernest effects in Mn3Sn. Denisty functional thoery shows Weyl points close to Fermi energy are responsible for anomalous transport properties and can be controled by magnetism via spin-orbit coupling.

In this talk, I will present our neutron diffraction results at various temperatures and magnetic fields to understand the magnetic structure of Mn3Sn in different magnetic phases. With vertical magnet and polarized neutron beam, we are able to clear the ambiguity in previous works and establish the exact k=0 anti-chiral spin structure at room temperature. For the incommensurate phase, the relation between ordering vectors and temperature was investigated and a refined mangetic structure at 250K will be presentated. At the end of this talk, the orgin of the incommensurabilties will be discussed with a proposed Hamiltonian.

*This work was supported as part of the Institute for Quantum Matter, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award No. DE-SC0019331.

–

Presenters

  • Youzhe Chen

    • Johns Hopkins University

Authors

  • Youzhe Chen

    • Johns Hopkins University

  • Jonathan Gaudet

    • The Johns Hopkins University
    • Johns Hopkins University
    • Institute for Quantum Matter and Department of Physics and Astronomy, Johns Hopkins University

  • Guy G Marcus

    • Johns Hopkins University
    • Institute for Quantum Matter and Department of Physics and Astronomy, Johns Hopkins University

  • Sayak Dasgupta

    • Johns Hopkins University

  • Muhammad Ikhlas

    • Institute for Solid State Physics, the University of Tokyo
    • ISSP, The University of Tokyo
    • Univ of Tokyo-Kashiwanoha
    • Institute for Solid State Physics, Univ of Tokyo-Kashiwanoha
    • ISSP, University of Tokyo

  • Taishi Chen

    • Institute for Solid State Physics, University of Tokyo
    • Univ of Tokyo-Kashiwanoha
    • Institute for Solid State Physics, Univ of Tokyo-Kashiwanoha

  • Takahiro Tomita

    • ISSP, The University of Tokyo
    • Univ of Tokyo-Kashiwanoha
    • Institute for Solid State Physics, Univ of Tokyo-Kashiwanoha

  • Jiao Lin

    • Oak Ridge National Laboratory
    • Spallation Neutron Source, Oak Ridge National Laboratory
    • Neutron Scattering Division, Oak Ridge National Laboratory

  • Wangchun Chen

    • National Institute of Standards and Technology
    • NIST Center of Neutron Research, National Institute of Standards and Technology
    • NIST Center for Neutron Research, National Institute of Standards and Technology

  • Yang Zhao

    • NIST Center of Neutron Research, National Institute of Standards and Technology
    • NIST Center for Neutron Research
    • NIST Center for Neutron Research, National Institute of Standards and Technology
    • NIST

  • Matthew Stone

    • Oak Ridge National Lab
    • Neutron Scattering Division, Oak Ridge National Laboratory
    • Quantum Condensed Matter Div, Oak Ridge National Lab
    • Oak Ridge National Laboratory
    • Spallation Neutron Source, Oak Ridge National Laboratory
    • Neutron Scattering Division, Oak Ridge National Lab
    • Neutron Scattering Division, OakRidge National Laboratory

  • Satoru Nakatsuji

    • Univ of Tokyo-Kashiwanoha
    • University of Tokyo
    • Institute for Solid State Physics, University of Tokyo
    • Institute for Solid State Physics, the University of Tokyo
    • Department of Physics, The University of Tokyo
    • Department of Physics, University of Tokyo
    • The Institute for Solid State Physics, The University of Tokyo
    • Institute for Solid State Physics, Univ of Tokyo-Kashiwanoha

  • Oleg Tchernyshyov

    • Johns Hopkins University
    • Institute for Quantum Matter and Department of Physics and Astronomy, Johns Hopkins University

  • Collin Leslie Broholm

    • The Johns Hopkins University
    • Johns Hopkins University
    • Physics and Astronomy, Johns Hopkins University
    • Physics, The Johns Hopkins University
    • Institute for Quantum Matter and Department of Physics and Astronomy, Johns Hopkins University