Perturbative calculation of the spin-wave dispersion in a disordered double-exchange model

Abstract

We study the spin-wave dispersion of localized spins in a disordered double-exchange model using the perturbation theory with respect to the strength of the disorder potential. We calculate the dispersion upto the next-leading order, and extensively examine the case of one-dimension. We show that in that case, disorder yields anomalous gapped-like behavior at the Fermi wavenumber of the conduction electrons.

9 pages, 5 figures

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Cited by in corpus (1)

• Colossal magnetoresistance and quenched disorder in manganese oxides