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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.

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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