Metallic Spin Liquid-like Behavior of LiV${}_2$O${}_4$

Abstract

LiV${}_2$O${}_4$ spinel is known to exhibit heavy fermion-like behavior below a characteristic temperature $T_K\simeq 20$ K, while it preserves a paramagnetic state down to $T\sim 10^{-2}$ K due to geometrical frustration. Here, it is shown that the dynamical spin susceptibility $\chi (\mathbf{q},\omega )$ in LiV${}_2$O${}_4$ exhibits anomalous duality which is modeled as a sum of itinerant (${\chi }_{\mathrm{F}}$) and local (${\chi }_{\mathrm{L}}$) components,and that the local spin dynamics inferred from ${\chi }_{\mathrm{L}}(\mathbf{q},\omega )$ is qualitatively different from that expected from time-averaged bulk properties. The anomaly coexists with the marginal Fermi liquid behavior inferred from the $-\ln T$ dependence of the electronic specific heat over a wide temperature range below $T_K$. We argue that such unusual properties of LiV${}_2$O${}_4$ can be attributed to the putative metallic spin liquid state emerging near the quantum critical point between spin glass and Fermi liquid states.

arXiv comment5 pages, 3 figures, Supplemental Material

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Cited by in corpus (5)

• New Microscopic Magnetic Hamiltonian for Exotic Spin Textures in Metals
• Quantum critical spin-liquid-like behavior in S = 1/2 quasikagome lattice CeRh1-xPdxSn investigated using muon spin relaxation and neutron scattering
• ${\mathbb{Z}}_2$ metallic spin liquid on a frustrated Kondo lattice
• LiV2O4: Hund-Assisted Orbital-Selective Mottness
• Exploring the Electronic Nature of Spinel Oxides: A Review of Their Electron Interactions and Prospects