Low-energy spin fluctuations in the metallic spinel compound LiV{sub 2}O{sub 4}

Journal Article · Thu Aug 20 04:00:00 EDT 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3225486· OSTI ID:21344506

Yushankhai, V Yu ^[1]; Thalmeier, P; Takimoto, T ^[2]

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1. Joint Institute for Nuclear Research, 141980 Dubna (Russian Federation)
2. Max-Planck-Institut fuer Chemische Physik fester Stoffe, D-01187 Dresden (Germany)

In the family of transition metal oxides the spinel compound LiV{sub 2}O{sub 4} is a rare metallic system showing heavy fermion behavior. In particular, an anomalously large specific heat coefficient gamma = C/T and strongly enhanced magnetic susceptibility chi{sub s} were detected in the low temperature limit, T<30 K. Recently we have proposed a model which allowed us to relate such an anomalous behavior of LiV{sub 2}O{sub 4} to the proximity of the underlying 3d-electron system to a magnetic instability at T->0. The emergence of a rather peculiar paramagnetic ground state with largely degenerate lowenergy 'critical' antiferromagnetic fluctuations in LiV{sub 2}O{sub 4} is the combined effect of strong electron correlations and the geometrical frustration of V-ion pyrochlore lattice forming the metallic system in this compound. A self-consistent renormalization theory was developed to describe effects of strong coupling between spin fluctuation modes and their evolution with varying temperature and external pressure. The theory was shown to provide a firm basis for understanding many peculiar properties of spin dynamics obtained in the inelastic neutron scattering and NMR measurements on LiV{sub 2}O{sub 4}.

• OSTI ID: 21344506
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1162; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALI METAL COMPOUNDS
ANGULAR MOMENTUM
ANTIFERROMAGNETISM
BRILLOUIN ZONES
CHARGED PARTICLES
COHERENT SCATTERING
CORRELATIONS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIFFRACTION
ELECTRON CORRELATION
ENERGY LEVELS
FLUCTUATIONS
GROUND STATES
INELASTIC SCATTERING
IONS
LITHIUM COMPOUNDS
MAGNETIC PROPERTIES
MAGNETIC RESONANCE
MAGNETIC SUSCEPTIBILITY
MAGNETISM
NEUTRON DIFFRACTION
NUCLEAR MAGNETIC RESONANCE
OXYGEN COMPOUNDS
PARAMAGNETISM
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
PRESSURE DEPENDENCE
RENORMALIZATION
RESONANCE
SCATTERING
SPECIFIC HEAT
SPIN
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
VANADATES
VANADIUM COMPOUNDS
VANADIUM IONS
VARIATIONS
ZONES