Large anomalous Hall effect in kagome antiferromagnet U<sub>3</sub>Ru<sub>4</sub>Al<sub>12</sub>

ORAL

Abstract

The Berry curvature in ferromagnets and antiferromagnets has been attracting huge interests due to the tunability of topological features via the magnetic structure. However, topological features in magnetic heavy fermion systems have been sparsely studied so far. In this study, we measured the anomalous Hall effect (AHE) of kagome heavy fermion antiferromagnet U3Ru4Al12. A large intrinsic AHE at high fields was observed, suggesting the presence of a large Berry curvature due to Weyl fermion. Moreover, the fields required to obtain the large Berry curvature are significantly different between B//a and B//a*, providing a mechanism to control the topological response in this system. These results may not only help to understand the topological heavy fermion physics, but also shed light on this system as an ideal playground for studying field-tuned topological states.

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Presenters

  • Tomoya Asaba

    • Physics, University of Michigan
    • MPA-CMMS, Los Alamos National Laboratory
    • Department of Physics, University of Michigan
    • University of Michigan
    • Los Alamos National Laboratory

Authors

  • Tomoya Asaba

    • Physics, University of Michigan
    • MPA-CMMS, Los Alamos National Laboratory
    • Department of Physics, University of Michigan
    • University of Michigan
    • Los Alamos National Laboratory

  • Eric Bauer

    • Los Alamos National Laboratory, Los Alamos, NM 87545, USA
    • Los Alamos National Laboratory
    • MPA-CMMS, Los Alamos National Laboratory, Los Alamos, USA
    • MPA-CMMS, Los Alamos National Laboratory
    • Los Alamos National Laboratory, Los Alamos, New Mexico, USA
    • Los Alamos National Labs

  • Joe D Thompson

    • Los Alamos National Laboratory
    • MPA-CMMS, Los Alamos National Laboratory, Los Alamos, USA
    • MPA-CMMS, Los Alamos National Laboratory
    • Condensed Matter and Magnet Sciences, Los Alamos National Laboratory

  • Filip Ronning

    • Los Alamos National Laboratory, Los Alamos, NM 87545, USA
    • Los Alamos National Laboratory
    • MPA-CMMS, Los Alamos National Laboratory, Los Alamos, USA
    • MPA-CMMS, Los Alamos National Laboratory
    • Los Alamos National Laboratory, Los Alamos, New Mexico, USA
    • Los Alamos National Labs