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)
[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
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Mingxuan Fu
Department of Physics and ISSP, University of Tokyo
Authors
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Mingxuan Fu
Department of Physics and ISSP, University of Tokyo
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Akito Sakai
Department of Physics and ISSP, University of Tokyo
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Naoki Sogabe
ISSP, University of Tokyo
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Masaki Tsujimoto
ISSP, University of Tokyo
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Yosuke Matsumoto
Max Planck Inst. for Solid State Research
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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