Pressurizing an antiferromagnetic topological insulator candidate

ORAL

Abstract

Intrinsic magnetic topological insulators hold the potential of hosting quantum anomalous Hall states, chiral Majorana fermions, and topological magnetoelectric effects. We have identified Zintl antiferromagnet Eu5In2Sb6 as a candidate material which displays remarkable insulating behavior. Our previous results showed the presence of colossal magnetoresistance in this system, which is consistent with the presence of magnetic polarons. Here we investigate the effects of applied hydrostatic and uniaxial pressure on Eu5In2Sb6 single crystals in an effort to drive the system through a topological phase transition. Our results show an exceptionally large decrease in resistivity under applied hydrostatic pressure as well as uniaxial pressure along the c axis.

*Work at Los Alamos was performed under the auspices of the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Science and Engineering.

–

Presenters

  • Priscila Rosa

    • Los Alamos National Laboratory
    • Los Alamos Natl Lab
    • Los Alamos National Laboratory, USA

Authors

  • Priscila Rosa

    • Los Alamos National Laboratory
    • Los Alamos Natl Lab
    • Los Alamos National Laboratory, USA

  • Sean Thomas

    • Los Alamos National Laboratory
    • Los Alamos Natl Lab

  • Eric Bauer

    • Los Alamos National Laboratory
    • Los Alamos Natl Lab
    • Condensed Matter and Magnet Science Group, Los Alamos National Laboratory
    • Los Alamos National Laboratory, Los Alamos

  • Joe D Thompson

    • Los Alamos National Laboratory
    • Los Alamos Natl Lab

  • Filip Ronning

    • Los Alamos National Laboratory
    • Los Alamos Natl Lab
    • Condensed Matter and Magnet Science Group, Los Alamos National Laboratory