Spin liquid in 3D Kondo lattice. High temperature regime

Details Spin liquid in 3D Kondo lattice. High temperature regime Spin liquid in 3D Kondo lattice. High temperature regime

1996-08-26

arxiv.org/abs/cond-mat/9608121v1

Physics

Condensed Matter

LaTeX, 8 pages plus 2 Encapsulated Postscript figures, Proceedings of SCES'96, to be published in Physica B

Scientific paper

10.1016/S0921-4526(96)00623-0

The mechanism explaining the key role of AFM correlations in formation of the heavy fermion state is offered. It is shown that in the case of $(T^*-T_N)/T_N << 1$ the critical spin fluctuations transform the mean-field second-order transition to RVB state into the crossover from high-temperature paramagnetic behavior of localized spins to strongly correlated spin liquid with quasi itinerant character of susceptibility. Thus the spin liquid state {\it by its origin} is close to magnetic instability, so either short-range or long-range AFM order should arise at low T.

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