Electronic structure and quantum oscillations of the kagome metal YMn<sub>6</sub>Sn<sub>6</sub>

ORAL

Abstract

Kagome-net magnets form a popular class of materials for topologically nontrivial magnetic and electronic structures. YMn6Sn6 is a prototype of such compounds. It forms an hexagonal P6/mmm structure consisting of kagome planes [Mn3Sn] separated by two inequivalent Sn3 and Sn2Y layers, thereby providing a platform for topological electronic features inherent to the kagome geometry (e.g. Dirac cones), and complex magnet structures arising from the parametric frustration. We have recently realized a series of competing magnetic phases together with a fluctuation-driven topological Hall effect in this compound [1]. Here we present the calculated electronic structure of YMn6Sn6 along with de Haas-van Alphen and Shubnikov-de Haas oscillation data in magnetic fields of up to 60 T and temperatures down to 0.5 K. A plethora of oscillations is observed, reflecting the intricate Fermi surface, whilst phase and effective mass analysis hints at the role of Dirac fermions.
[1] Ghimire et al., arXiv:2007.02399.

*Some of the work reported was carried out at the National High Magnetic Field Laboratory, which is funded by NSF Cooperative Agreements DMR-1157490 and 1164477, the State of Florida and U.S. Department of Energy. JS acknowledges the DOE BES program “Science in 100 T”.

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Presenters

  • Nirmal Jeevi Ghimire

    • George Mason University
    • Argonne National Laboratory
    • Physics and Astronomy, George Mason University
    • Department of Physics and Astronomy, George Mason University
    • Physics, George Mason University

Authors

  • Nirmal Jeevi Ghimire

    • George Mason University
    • Argonne National Laboratory
    • Physics and Astronomy, George Mason University
    • Department of Physics and Astronomy, George Mason University
    • Physics, George Mason University

  • Peter Siegfried

    • Department of Physics, University of Colorado, Boulder
    • Physics and Astronomy, George Mason University
    • Physics, George Mason University

  • Igor Mazin

    • Physics & Astronomy, George Mason University
    • Department of Physics and Astronomy, George Mason University
    • George Mason University
    • Physics and Astronomy, George Mason University
    • Physics, George Mason University
    • Department of Physics and Astronomy,, George Mason University
    • Department of Physics and Astronomy and Quantum Science and Engineering Center, George Mason University – Fairfax, VA, USA

  • Eleni Kyriazi

    • University of California, Los Angeles

  • Roxanne Tutchton

    • Los Alamos National Laboratory
    • Center for Integrated Nanotechnologies, Los Alamos National Laboratory

  • John Singleton

    • National High Magnetic Field Laboratory, Los Alamos National Laboratory
    • Los Alamos National Lab
    • Los Alamos National Laboratory
    • LANL, NHMFL
    • National High Magnetic Field Laboratory (NHMFL), Los Alamos