High Field Magnetization of NaYb<sub>x</sub>Lu<sub>1-x</sub>Se<sub>2</sub>: Tracking the Evolution from Single Ion Effects to Many-Body Correlations

ORAL

Abstract

NaYbSe2 belongs to a recently discovered class of delafossites, a number of which exhibit the hallmarks typical of a quantum spin liquid. These include the absence of long-range magnetic order, persistent spin fluctuations [Bordelon et al., Nature Physics (2019)], and a large anomalous heat capacity [Ranjith et al., PRB (2019)], all at the lowest measurable temperatures. In a previous study, we were successful in growing the doping series NaYbxLu1-xSe2, substituting Yb3+ for non-magnetic Lu3+. This allowed us to demonstrate the evolution of magnetic interactions from single ion effects at low Yb doping to highly-correlated many-body entanglement in NaYbSe2 [Pritchard Cairns et al., PRB (2022)]. Seeking a more quantitative analysis, we have performed pulsed field magnetization measurements in fields of up to 60 T. By modeling the results obtained for different dopings and temperatures, we are able to shed light on the correlations in the full magnetic compound and on this broader class of quantum spin liquid candidate materials.

*This work was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division, under Contract No. DEAC02-05-CH11231 within the Quantum Materials program (KC2202).

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Presenters

  • Kenneth Ng

    • University of California, Berkeley

Authors

  • Kenneth Ng

    • University of California, Berkeley

  • Luke Pritchard Cairns

    • University of Califronia, Berkeley
    • University of California, Berkeley

  • Yuanqi Lyu

    • UC Berkeley
    • University of California, Berkeley

  • Chunxiao Liu

    • University of California, Berkeley

  • John Singleton

    • Los Alamos National Laboratory

  • James Analytis

    • Universtiy of California, Berkeley
    • UC Berkeley
    • University of California, Berkeley