CMR effect observed in Monte Carlo simulations of double-exchange models with Jahn-Teller lattice distortions (original) (raw)

2010

Abstract

The two eg-orbital model, including Jahn-Teller lattice distortions and the superexchange interaction, is studied using unbiased exact diagonalization Monte Carlo techniques at a doping value x=0.25. A canonical colossal magnetoresistance (CMR) resistivity vs. temperature shape is obtained with a resistivity peak of nearly two orders of magnitude. We investigate the Monte Carlo evolution and temperature dependence of the spin, lattice,

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