Geometric Magnetic Frustration in Y<sub>2-x</sub>Bi<sub>x</sub>Ru<sub>2</sub>O<sub>7</sub> Pyrochlores across the Metal-Insulator transition

ORAL

Abstract

Systems based on a triangular or pyrochlore lattice of corner sharing tetrahedra with nearest neighbor antiferromagnetic exchange interactions are the archetypal examples of geometric magnetic frustration, offering a means of accessing novel ground states. Magnetic systems based on 4d and 5d transition metal ions on the pyrochlore lattice offer a unique opportunity to explore the exotic ground states which potentially arise when the electron-electron Coulomb interaction, electronic bandwidth and spin orbit coupling are all of comparable magnitude. I will describe magnetization and muon spin relaxation investigations of a series of 4d Ru4+ based pyrochlores, which may be controllably tuned through a metal insulator transition, providing insight into the magnetic correlations as these finely balanced systems evolve from a localized to itinerant spin character.

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Presenters

  • Sarah Dunsiger

    • CMMS, TRIUMF
    • TRIUMF
    • Centre for Molecular and Materials Science, TRIUMF, Vancouver, British Columbia V6T 2A3, Canada

Authors

  • Sarah Dunsiger

    • CMMS, TRIUMF
    • TRIUMF
    • Centre for Molecular and Materials Science, TRIUMF, Vancouver, British Columbia V6T 2A3, Canada

  • Sang-Wook Cheong

    • Rutgers University
    • R-CEM & Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
    • Rutgers Center for Emergent Materials, Rutgers University
    • Department of Physics and Astronomy, Center for Emergent Materials, Rutgers University; Max Planck POSTECH/Korea Research Initiative, Pohang University of Science and Technol
    • Physics and Astronomy, Rutgers University
    • Rutgers University, Physics and Astronomy, and Laboratory for Pohang Emergent Materials and Max Plank POSTECH Center for Complex Phase Materials, Pohang University of Science
    • Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
    • Rutgers University, Piscataway
    • Department of Physics and Astronomy, Rutgers University, New Brunswick
    • Department of Physics and Astronomy, Rutgers University
    • Department of Physics, Rutgers University
    • Physics & Astronomy, Rutgers University
    • Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University
    • Rutgers University, New Brunswick
    • Physics, Rutgers University
    • Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA

  • Kim Hooh Chow

    • Physics, University of Alberta

  • Martin H Dehn

    • University of British Columbia
    • Physics and Astronomy, University of British Columbia

  • Shayan Gheidi

    • Simon Fraser Univ
    • Physics, Simon Fraser University
    • Department of Physics, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada

  • Namjung Hur

    • Physics, Inha University

  • Kee Hoon Kim

    • Physics and Astronomy, Seoul National University

  • Graeme Luke

    • McMaster Univ
    • Physics and Astronomy, McMaster University
    • Department of Physics & Astronomy, McMaster University
    • McMaster University

  • Gerald Morris

    • TRIUMF

  • Timothy Munsie

    • Physics and Astronomy, McMaster University
    • Department of Physics & Astronomy, McMaster University

  • Jeff Sonier

    • Simon Fraser Univ
    • Physics, Simon Fraser University
    • Department of Physics, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada

  • Shyam Sundar

    • Simon Fraser Univ
    • Physics, Simon Fraser University
    • Department of Physics, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada