New kagome prototype materials: discovery of KV<sub>3</sub>Sb<sub>5</sub>, RbV<sub>3</sub>Sb<sub>5</sub>, CsV<sub>3</sub>Sb<sub>5</sub>

ORAL

Abstract

With its unique and elegant structure, the kagome lattice is a key platform for the study of condensed matter physics. From quantum spin liquid candidates, topologically nontrivial phases, and Weyl semi-metal candidates, these materials are poised at the frontier of material science. The kagome metals, in particular, offer unique opportunities due to the delocalization of electrons and renormalization of the electronic and magnetic ground state. Recently we discovered a new class of kagome metals: KV3Sb5, RbV3Sb5, and CsV3Sb5, all of which crystallize in the P6/mmm space group and exhibit a structurally perfect kagome lattice of vanadium. Our work has indicated that these materials are prime candidates for correlated electron phenomenon (anomalous Hall, heavy fermion transport, etc.). Furthermore, the Fermi level is in close proximity to Dirac features, and we can demonstrate Fermi level tuning through deintercalation of the alkali metal. Our work indicates that KV3Sb5 and its cogeners are fruitful candidates for the exploration of exotic transport phenomena.

*California NanoSystems Institute, Elings Fellowship program
National Science Foundation: 1729594, 1729149, 1437106, DMR1720256, DMR1508249, GRFP1650114
U.S. Department of Energy: DE-SC0019331, DE-SC0017752, DE-AC02-06CH11357

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Presenters

  • Brenden Ortiz

    • University of California, Santa Barbara
    • Materials Engineering, University of California, Santa Barbara
    • Colorado School of Mines
    • California NanoSystems Institute/Materials, University of California, Santa Barbara

Authors

  • Brenden Ortiz

    • University of California, Santa Barbara
    • Materials Engineering, University of California, Santa Barbara
    • Colorado School of Mines
    • California NanoSystems Institute/Materials, University of California, Santa Barbara

  • Lidia Gomes

    • University of Illinois at Urbana-Champaign

  • Jennifer R Morey

    • Johns Hopkins University

  • Michal J. Winiarski

    • Applied Physics and Mathematics, Gdansk University of Technology
    • Gdansk University of Technology
    • Johns Hopkins University

  • Mitchell Bordelon

    • University of California, Santa Barbara

  • John S Mangum

    • Metallurgical and Materials Engineering, Colorado School of Mines
    • Colorado School of Mines

  • Iain Oswald

    • Colorado State University

  • Jose Rodriguez-Rivera

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

  • James Neilson

    • Colorado State University

  • Stephen Wilson

    • University of California, Santa Barbara
    • Materials Department, University of California, Santa Barbara
    • Materials Engineering, University of California, Santa Barbara
    • California NanoSystems Institute/Materials, University of California, Santa Barbara

  • Elif Ertekin

    • University of Illinois at Urbana-Champaign

  • Tyrel McQueen

    • Johns Hopkins University
    • Chemistry, Johns Hopkins Univ
    • Institute for Quantum Matter and Department of Physics and Astronomy, Johns Hopkins University

  • Eric Toberer

    • Colorado School of Mines