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Phase Transitions in the Symmetric Kondo Lattice Model in Two and Three Dimensions

Zhu-Pei Shi·Rajiv R. P. Singh·Martin P. Gelfand·Ziqiang Wang
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Abstract

We present an application of high-order series expansion in the coupling constants for the ground state properties of correlated lattice fermion systems. Expansions have been generated up to order $(t/J)^{14}$ for $d=1$ and $(t/J)^8$ for $d=2,\ 3$ for certain properties of the symmetric Kondo lattice model. Analyzing the susceptibility series, we find evidence for a continuous phase transition from the ``spin liquid'' phase characteristic of a ``Kondo Insulator'' to an antiferromagnetically ordered phase in dimensions $d\ge2$ as the antiferromagnetic Kondo coupling is decreased. The critical point is estimated to be at $(t/J)_c\approx0.7$ for square lattice and $(t/J)_c\approx0.5$ for simple-cubic lattice.

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Zhu-Pei Shi, Rajiv R. P. Singh, Martin P. Gelfand, Ziqiang Wang. 1995-04-06. Phase Transitions in the Symmetric Kondo Lattice Model in Two and Three Dimensions. https://doi.org/10.1103/physrevb.51.15630

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