Heavy Fermion Behaviors in LiV_{2}O_{4}

TL;DR

This paper reviews experimental evidence showing LiV_{2}O_{4} exhibits heavy fermion behaviors at low temperatures, with a crossover to different magnetic states above 50 K, and discusses recent theoretical insights.

Contribution

It provides a comprehensive review of experimental data and theoretical understanding of heavy fermion behaviors in LiV_{2}O_{4}.

Findings

Heavy fermion behavior observed below 10 K.

Crossover to magnetic states above 50 K.

Discussion of recent theoretical models.

Abstract

Experiments of various types on the metallic transition metal oxide compound LiV_{2}O_{4} with the fcc normal-spinel structure are reviewed. The low-temperature T < 10 K data consistently indicate heavy fermion (HF) behaviors characteristic of those of the heaviest-mass f-electron HF compounds. A crossover is observed above about 50 K in the magnetic susceptibility, ^{7}Li spin-lattice relaxation rate and neutron magnetic scattering function to a magnetic state variously described as an antiferromagnetically-coupled local-moment metal or, at the opposite extreme, as an itinerant nearly-ferromagnetic metal. Recent theoretical investigations to understand these properties of LiV_{2}O_{4} are discussed.