Dynamic spin susceptibility of paramagnetic spinel LiV2O4

Details Dynamic spin susceptibility of paramagnetic spinel LiV2O4 Dynamic spin susceptibility of paramagnetic spinel LiV2O4

2007-03-17

arxiv.org/abs/cond-mat/0703456v1

Physics

Condensed Matter

Strongly Correlated Electrons

26 pages, 6 figures, submitted to PRB

Scientific paper

10.1103/PhysRevB.76.085111

In an attempt to explain inelastic neutron scattering data for LiV2O4 the dynamical spin susceptibility \chi(Q,w) at zero temperature is calculated. Starting point is a weak coupling approach based on the LDA bandstructure for that material. It is supplemented by a RPA treatment of local on-site interactions and contains an adjustable parameter. Due to the geometrically frustrated lattice structure the magnetic response is strongly enhanced in the vicinity of a nearly spherical surface in Q-space. We compare these results with recent low-temperature neutron scattering data. The measured spin relaxation rate \Gamma is used to estimate the spin fluctuation contribution to the specific heat.

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