Quantum Phase Transitions and De-Coupling of Magnetic Sublattices in the Quasi-Two Dimensional Ising Magnet Co3V2O8 in a Transverse Magnetic Field

ORAL

Abstract

The application of a magnetic field transverse to the easy axis, Ising direction in the quasi-two dimensional Kagome staircase magnet, Co$_3$V$_2$O$_8$, induces three quantum phase transitions at low temperatures, ultimately producing a novel high field polarized state, with two distinct sublattices. New time-of-flight neutron scattering techniques, accompanied by large angular access, high magnetic field infrastructure allows the mapping of a sequence of ferromagnetic and incommensurate phases and their accompanying spin excitations. At least one of the transitions to incommensurate phases at $\mu_0H_{c1}\sim6.25$ T and $\mu_0H_{c2}\sim7$ T are discontinuous, while the final quantum critical point at $\mu_0H_{c3}\sim 13$ T is continuous.

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Authors

  • Katharina Fritsch

    • Helmholtz-Zentrum Berlin f\"{u}r Materialien und Energie (HZB), Berlin, Germany; Dept. of Physics and Astronomy, McMaster University, Hamilton, Canada
    • Helmholtz-Zentrum Berlin f\"ur Materialien und Energie

  • Georg Ehlers

    • Neutron Scattering Science Division, ORNL, Oak Ridge, USA
    • Oak Ridge National Laboratory
    • Oak Ridge National Laboratory, TN

  • K. C. Rule

    • HZB; ANSTO, Lucas Heights, Australia

  • K. Habicht

    • HZB

  • M. Ramazanoglu

    • Dept. of Physics and Astronomy, McMaster University

  • H. A. Dabkowska

    • Brockhouse Institute for Materials Research (BIMR), Hamilton, Canada

  • Bruce Gaulin

    • Dept. of Physics and Astronomy, McMaster University; BIMR; Canadian Institute for Advanced Reseach, Toronto, Canada
    • Mcmaster University
    • Department of Physics and Astronomy, McMaster University