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Table of contents

Transition Metal Oxides: Many Body Physics Meets Solid State Chemistry

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Electronically: Cu2+ ~ d9 one electron in anti Jahn-Teller state (dx2 –y2)

Cuprate phase diagram

Manganites : Re1-xAxMnO3

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Phase Diagram

Material Trends ( From M.Imada, A. Fujimori, and Y. Tokura, Rev. Mod. Phys. 70, 1039 (1998) )

Colossal Magneto-resistance (CMR) (From P. Schiffer et al. Phys. Rev. Lett. 75, 3336, 1995)

Other unusual properties

Interactions at Work and Scales : JH , t , U, EJT , ħωo

New two-fluid (localized + band electron) model for manganites

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Picturizing the ferro-insulator to ferro-metal transition and the 2-fluid model

Material Systematics (varying Do) ( For fixed EJT = 0.5 eV , U = 5 eV, JF ~ (Do)2 )

Real space structure in the presence of long range Coulomb interactions

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Author: Academy office