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Metallic spin-liquid-like behavior of LiV2O4

H. Okabe, M. Hiraishi, A. Koda, K. M. Kojima, S. Takeshita, I. Yamauchi, Y. Matsushita, Y. Kuramoto, and R. Kadono
Phys. Rev. B 99, 041113(R) – Published 17 January 2019
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Abstract

LiV2O4 spinel is known to exhibit heavy-fermion-like behavior below a characteristic temperature TK20 K, while it preserves a paramagnetic state down to T102 K due to geometrical frustration. Here, it is shown that the dynamical spin susceptibility χ(q,ω) in LiV2O4 exhibits an anomalous duality which is modeled as a sum of itinerant (χF) and local (χL) components, and that the local spin dynamics inferred from χL(q,ω) is qualitatively different from that expected from time-averaged bulk properties. The anomaly coexists with the marginal Fermi-liquid behavior inferred from the lnT dependence of the electronic specific heat over a wide temperature range below TK. We argue that such unusual properties of LiV2O4 can be attributed to the putative metallic spin-liquid state emerging near the quantum critical point between spin-glass and Fermi-liquid states.

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  • Received 20 April 2018
  • Revised 13 July 2018

DOI:https://doi.org/10.1103/PhysRevB.99.041113

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

H. Okabe1,2,3, M. Hiraishi1,2, A. Koda1,2,3, K. M. Kojima1,2,3, S. Takeshita1,2, I. Yamauchi4, Y. Matsushita5, Y. Kuramoto2,6, and R. Kadono1,2,3,*

  • 1Muon Science Laboratory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
  • 2Condensed Matter Research Center, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
  • 3The Graduate University for Advanced Studies (Sokendai), Tsukuba, Ibaraki 305-0801, Japan
  • 4Department of Physics, Graduate School of Science and Engineering, Saga University, Saga 840-8502, Japan
  • 5National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan
  • 6Department of Physics, Kobe University, Kobe 657-8501, Japan

  • *Corresponding author: ryouke.kadono@kek.jp

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Issue

Vol. 99, Iss. 4 — 15 January 2019

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