Magnetic phase diagram of a spin-1/2 compound Rb<sub>2</sub>Co<sub>2</sub>(SeO<sub>3</sub>)<sub>3 </sub>on<sub> </sub>a triangular lattice<sub> </sub>

ORAL

Abstract

Quantum spin liquid as a strong candidate for fault-tolerant quantum computation, has attracted intense investigation in recent years. One strong candidate to form the resonating valence bond state, one type of quantum spin liquid phases, is the quasi-2D low-spin system on a triangular lattice. Rb2Co2(SeO3)3 is such a system containing spin-1/2 Co2+ ions. The Rb atoms sit in between the triangular lattice planes, which reduces the 3D magnetic interactions, providing access to quasi-2D frustrated quantum magnetism. In this talk, we will present magnetization, magnetocaloric effect, and electrical capacitance measurement results of Rb2Co2(SeO3)3 up to a magnetic field of 60 T. Six magnetization plateaus were observed with a saturation magnetic field of 25 T parallel to the crystallographic c-axis. Features corresponding to the magnetization plateaus were also observed in the other measurements, indicating strong magneto-elastic coupling. We will discuss the details and show a comprehensive temperature-magnetic field phase diagram of Rb2Co2(SeO3)3.

*The facilities of the National High Magnetic Field Laboratory are supported by the National Science Foundation Cooperative Agreement No. DMR-2128556, and the State of Florida and the U.S. Department of Energy. Shengzhi Zhang, Minseong Lee, and Vivien Zapf acknowledge the LDRD program at Los Alamos National Laboratory. The research at Princeton University was funded by the Gordon and Betty Moore Foundation, grant number GBMF-9066. The work at JHU was supported as part of the Institute for Quantum Matter, an Energy Frontier Research Center, funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award No. DE-SC0019331 and by the Gordon and Betty Moore Foundation, grant number GBMF-9456.

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Presenters

  • Shengzhi Zhang

    • Los Alamos National Laboratory (LANL)

Authors

  • Shengzhi Zhang

    • Los Alamos National Laboratory (LANL)

  • Tong Chen

    • John Hopkins University

  • Xianghan Xu

    • Princeton University

  • Eric Brosha

    • Los Alamos National Laboratory

  • Robert J Cava

    • Princeton University

  • Collin L Broholm

    • Johns Hopkins University

  • Vivien Zapf

    • Los Alamos National Laboratory (LANL)

  • Minseong Lee

    • National High Magnetic Field Laboratory