New correlated model of colossal magnetoresistive manganese oxides.
A new minimal model is constructed for the doped manganese oxides which exhibit colossal magnetoresistance, involving a broad spin-majority conduction band as well as nearly localized spin-minority electron states. A simple mean-field analysis yields a temperature-dependent hybridized band structure with suppressed carrier weight at the Fermi level. Spin stiffness is complex, indicating strong spin-wave damping. Further investigations are needed to verify the relevance of the proposed model.
Golosov
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DI
Department of Physics and the Resnick Institute, Bar-Ilan University, Ramat-Gan 52900, Israel. golosov@phys.huji.ac.il