New Correlated Model of Colossal Magnetoresistive Manganese Oxides

Details New Correlated Model of Colossal Magnetoresistive Manganese Oxides New Correlated Model of Colossal Magnetoresistive Manganese Oxides

2009-07-31

arxiv.org/abs/0907.5512v3

Phys. Rev. Lett. vol. 104, 207207 (2010)

Physics

Condensed Matter

Strongly Correlated Electrons

LaTeX-RevTeX, 5 pages, 2 figures, Phys. Rev. Lett., in press; minor corrections

Scientific paper

10.1103/PhysRevLett.104.207207

A new minimal model is constructed for the doped manganese oxides which exhibit colossal magnetoresistance (CMR), involving broad spin-majority conduction band as well as nearly localised spin-minority electron states. A simple mean field analysis yields a temperature-dependent hybridised band structure with suppressed carrier weight at the Fermi level. Spin stiffness is complex, indicating unusually strong spin wave damping. Experimental and theoretical investigations are needed to further verify the relevance of the proposed model.

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