Magnetic structure evolution of the Mn(Bi,Sb)<sub>2</sub>Te<sub>4</sub> family of intrinsic magnetic topological insulators

ORAL

Abstract

The Mn(Bi,Sb)2Te4 family of intrinsic magnetic topological insulators has been predicted to be an ideal platform to realize a high temperature quantum anomalous Hall state, an axion insulating state, as well as a variety of other non-trivial band topologies. The strong coupling between the magnetic ordering in these compounds and the details of their band structure makes understanding their magnetic structure and its evolution with chemistry and magnetic field critical for understanding these exotic states. Our prior work has demonstrated that the field driven spin canting in MnBi2Te4 drives the measured intrinsic anomalous Hall effect in that compound but there are many questions about the details of the evolution of magnetic phase diagram in this system as the Bi atoms are replaced with Sb. Prior magnetometry and magnetotransport shows a clear bulk magnetic behavior change with increased Sb content, but the microscopic details of this evolution are unclear. We will present structural and magnetic neutron scattering measurements and other magnetic characterization of the Mn(Bi,Sb)2Te4 family of compounds to clarify this evolution.

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Presenters

  • Colin Heikes

    • Joint Quantum Institute

Authors

  • Colin Heikes

    • Joint Quantum Institute

  • Patrick Quarterman

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

  • Yangyang Chen

    • Physics, The Pennsylvania State University

  • Ya-Wen Chuang

    • Physics, The Pennsylvania State University

  • Seng Huat Lee

    • Pennsylvania State University
    • Department of Physics, Pennsylvania State University
    • Physics, The Pennsylvania State University
    • 2D Crystal Consortium, Materials Research Institute, Penn State University
    • Materials Research Institute, Pennsylvania State University

  • Yanglin Zhu

    • The Pennsylvania State University
    • Physics, Penn State University
    • Pennsylvania State University
    • Department of Physics, Pennsylvania State University
    • Department of Physics, The Pennsylvania State University
    • Physics, The Pennsylvania State University

  • Kevin Honz

    • Physics, The Pennsylvania State University
    • Physics, Pennsylvania State University

  • Yingdong Guan

    • Pennsylvania State University
    • Physics, The Pennsylvania State University

  • Yu Wang

    • Department of Physics, Penn State University
    • Physics, Penn State University
    • Physics, The Pennsylvania State University

  • Ke Wang

    • Pennsylvania State University
    • Materials Research Institute, The Pennsylvania State University

  • Zhiqiang Mao

    • Pennsylvania State University
    • Department of Physics, Penn State University
    • The Pennsylvania State University
    • Penn State University
    • Physics, Penn State University
    • Department of Physics, Pennsylvania State University
    • Department of Physics, The Pennsylvania State University
    • Physics, The Pennsylvania State University
    • Physics, Pennsylvania State University
    • Department of Materials Science and Engineering, Pennsylvania State University

  • Jun Zhu

    • Pennsylvania State University
    • Physics, The Pennsylvania State University

  • Pawel Zajdel

    • Institute of Physics, University of Silesia

  • Julie Borchers

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

  • William Ratcliff

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