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|Type:||Artigo de evento|
|Title:||Static And Dynamic Conductivity For A Model Of Tl2mn 2o7|
|Abstract:||The compound Tl2Mn2O7 exhibits colossal magneto resistance, which is not adequately explained by the double exchange mechanism. We use Hubbard operators to reformulate a previous model of Ventura and Alascio (Phys. Rev. B 56 (1997) 14533), and we obtain approximate one-electron Green's functions (GF) for this model, using a method introduced by Foglio and Figueira (Phys. Rev. B 60 (1999) 11361). With these GF we calculate the static and dynamic conductivity, both with and without applied magnetic fields. © 2003 Elsevier B.V. All rights reserved.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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