LiV$_2$O$_4$: frustration induced heavy fermion metal

Details LiV$_2$O$_4$: frustration induced heavy fermion metal LiV$_2$O$_4$: frustration induced heavy fermion metal

2002-03-13

arxiv.org/abs/cond-mat/0203288v3

Phys. Rev. Lett., 89, 267201 (2002).

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 2 figures, significant changes

Scientific paper

10.1103/PhysRevLett.89.267201

We propose a two-stage spin quenching scenario for the unusual heavy fermion state realized in the mixed valent metal LiV$_2$O$_4$. In this theory, local valence fluctuations are responsible for the formation of partially quenched, spin 1/2 moments below room temperature. Frustration of the intersite spin couplings then drives the system to produce the heavy Fermi liquid seen at low temperatures. The anomalous resistivity and the sign change of the Hall constant can be understood naturally within this model, which also predicts a unique symmetry for the heavy quasiparticle bands that may be observed in de Haas-van Alphen experiments.

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