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Spin liquid in 3D Kondo lattice. High temperature regime

K. A. Kikoin·M. N. Kiselev·A. S. Mishchenko
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Abstract

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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K. A. Kikoin, M. N. Kiselev, A. S. Mishchenko. 1996-08-26. Spin liquid in 3D Kondo lattice. High temperature regime. https://doi.org/10.1016/s0921-4526(96)00623-0

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