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Competition Between Antiferromagnetic Order and Spin-Liquid Behavior in the Two-Dimensional Periodic Anderson Model at Half-Filling

M. Vekic·J. W. Cannon·D. J. Scalapino·R. T. Scalettar·R. L. Sugar
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Abstract

We study the two-dimensional periodic Anderson model at half-filling using quantum Monte Carlo (QMC) techniques. The ground state undergoes a magnetic order-disorder transition as a function of the effective exchange coupling between the conduction and localized bands. Low-lying spin and charge excitations are determined using the maximum entropy method to analytically continue the QMC data. At finite temperature we find a competition between the Kondo effect and antiferromagnetic order which develops in the localized band through Ruderman-Kittel-Kasuya-Yosida interactions.

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M. Vekic, J. W. Cannon, D. J. Scalapino, R. T. Scalettar, R. L. Sugar. 1994-08-05. Competition Between Antiferromagnetic Order and Spin-Liquid Behavior in the Two-Dimensional Periodic Anderson Model at Half-Filling. https://doi.org/10.1103/physrevlett.74.2367

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