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Dynamical Mean-Field Solution for a Model of Metal-Insulator Transitions in Moderately Doped Manganites

Fan Zhong·Jinming Dong·Z. D. Wang
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Abstract

We propose that a specific spatial configuration of lattice sites that energetically favor {\it 3+} or {\it 4+} Mn ions in moderately doped manganites constitutes approximately a spatially random two-energy-level system. Such an effect results in a mechanism of metal-insulator transitions that appears to be different from both the Anderson transition and the Mott-Hubbard transition. Correspondingly, a disordered Kondo lattice model is put forward, whose dynamical mean-field solution agrees reasonably with experiments.

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Fan Zhong, Jinming Dong, Z. D. Wang. 1999-10-27. Dynamical Mean-Field Solution for a Model of Metal-Insulator Transitions in Moderately Doped Manganites. https://doi.org/10.1103/physrevb.58.15310

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