Non-Fermi Liquid Phenomena and Novel Quantum Criticality in the Multipolar Kondo System PrV<sub>2</sub>Al<sub>20</sub>

ORAL

Abstract

One of the central mysteries of strongly correlated electronic systems is the origin of the non-Fermi liquid (NFL) phase — a highly entangled quantum state that holds abiding fascination owing to its prime connections with unconventional superconductivity and quantum critically [1]. Metallic systems with strong hybridization between multipolar local moments and conduction electrons offer a fascinating stage for exploring the purely orbital-driven NFL and quantum criticality. The heavy-fermion superconductor PrV2Al20 is a model system of this kind, which features a nonmagnetic ground-state doublet, hosting both electric quadrupoles and magnetic octupoles [2,3]. Here, we present a comprehensive study of the NFL behavior in PrV2Al20 single crystals using transport and thermodynamic measurements [3]. Our findings reveal that the multipolar Kondo effect plays a crucial role in shaping the NFL behavior in PrV2Al20 and leads to field-induced quantum critical phenomena radically different from that observed in magnetic heavy fermion systems.

[1] P. Gegenwart, Q. Si, and F. Steglich, Nat. Phys. 4, 186 (2008)
[2] A. Sakai and S. Nakatsuji, J. Phys. Soc. Jpn. 80, 063701 (2011)
[3] M. Tsujimoto, et al., Phys. Rev. Lett. 113, 267001 (2014)
[3] M. Fu et al., J. Phys. Soc. Jpn. 89, 013704 (2020)

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Presenters

  • Mingxuan Fu

    • Department of Physics and ISSP, University of Tokyo

Authors

  • Mingxuan Fu

    • Department of Physics and ISSP, University of Tokyo

  • Akito Sakai

    • Department of Physics and ISSP, University of Tokyo

  • Naoki Sogabe

    • ISSP, University of Tokyo

  • Masaki Tsujimoto

    • ISSP, University of Tokyo

  • Yosuke Matsumoto

    • Max Planck Inst. for Solid State Research

  • Satoru Nakatsuji

    • Department of Physics and ISSP, University of Tokyo
    • Department of Physics, the University of Tokyo
    • Univ of Tokyo
    • Institute for Solid State Physics, University of Tokyo
    • The Institute for Solid State physics, The Univeristy of Tokyo
    • The Institute for Solid State Physics, The University of Tokyo
    • Institute for Solid State physics, University of Tokyo