Orbital correlations in monolayer manganites - From spin t-J model to orbital 
t-J model

Daghofer, M.; Oleś, A. M.

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Orbital correlations in monolayer manganites - From spin t-J model to orbital t-J model

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Daghofer, M.
Department Quantum Many-Body Theory (Walter Metzner), Max Planck Institute for Solid State Research, Max Planck Society;

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Oleś, A. M.
Department Quantum Many-Body Theory (Walter Metzner), Max Planck Institute for Solid State Research, Max Planck Society;

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Daghofer, M., & Oleś, A. M. (2007). Orbital correlations in monolayer manganites - From spin t-J model to orbital t-J model. Acta Physica Polonica A, 111(4), 497-512.

Cite as: https://hdl.handle.net/21.11116/0000-000E-B793-D

Abstract

On the example of monolayer manganites we show that the theoretical ideas developed long ago along the derivation of the spin t-J model from the Hubbard model are nowadays very helpful in strongly correlated oxides with partly filled degenerate orbitals. We analyze a realistic orbital t-J model for e(g) electrons in La1-xSr1+xMnO4 monolayer manganites, and discuss the evolution of spin and orbital correlations under increasing doping by performing exact diagonalization of finite clusters, with electronic kinetic energy determined self-consistently at a finite temperature by classical Monte Carlo for t(2g) spins. Several experimental results are reproduced.