Influence of spin fluctuations near the Mott transition: a DMFT study

Details Influence of spin fluctuations near the Mott transition: a DMFT study Influence of spin fluctuations near the Mott transition: a DMFT study

2010-06-18

arxiv.org/abs/1006.3620v2

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

Dynamics of local magnetic moments near the Mott metal-insulator transition is investigated by a Dynamical Mean-Field Theory solution of the Hubbard model with additional fully-frustrated Heisenberg interactions. Appearance of deviations from pure Curie behavior in the spin susceptibility shows that the temperature bending of the Mott transition lines is precisely associated with the onset of magnetic correlations induced by spin exchange. A weakening of the effective exchange energy upon approaching the Mott boundary from the Heisenberg limit is also observed.

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