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

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

2004-06-05

arxiv.org/abs/cond-mat/0406134v1

Physics

Condensed Matter

Strongly Correlated Electrons

9 pages, 5 figures

Scientific paper

10.1143/JPSJ.73.2646

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.

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