LiV2O4: evidence for two-stage screening

Details LiV2O4: evidence for two-stage screening LiV2O4: evidence for two-stage screening

2001-10-05

arxiv.org/abs/cond-mat/0110115v2

Physica B, 312-313, 711 (2002)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 1 figure, accepted for proceedings of SCES'2001 Physica B, minor changes

Scientific paper

10.1016/S0921-4526(01)01477-6

LiV2O4, a frustrated mixed valent metal (d^1 <-> d^2), is argued to undergo two spin-screening processes. The first quenches the effective spin to produce the spin 1/2 behavior seen below room temperature[1], while the second produces the heavy fermi liquid character seen at low temperatures[2]. We present here a preliminary discussion of a t-J model with strong Hund's coupling of the strongly correlated d-electrons. Valence fluctuations of the Hubbard operators (S = {1/2} <-> 1) combined with the frustration of the underlying corner-shared tetrahedral vanadium lattice are the essential components of our model.

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