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Microscopic theory of magnetic interactions in KCuF3 and LaMnO3 – The role of charge transfer

MPS-Authors
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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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Horsch,  P.
Department Quantum Many-Body Theory (Walter Metzner), Max Planck Institute for Solid State Research, Max Planck Society;

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Khaliullin,  G.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Oleś, A. M., Feiner, L. F., Horsch, P., & Khaliullin, G. (2006). Microscopic theory of magnetic interactions in KCuF3 and LaMnO3 – The role of charge transfer. physica status solidi (b), 243(1), 89-93.


Cite as: https://hdl.handle.net/21.11116/0000-000F-02F9-6
Abstract
We analyze the spin exchange interactions J(ab) and J(c) in the A-type
anti ferromagnetic phase of KCuF3 and LaMnO3. One finds that the quasi
one-dimensional spin interactions in KCuF3 are consistent with the
charge-transfer type of insulating state, while the modifications of
J(ab) and J(c) by the charge-transfer superexchange terms are moderate
in the Mott insulator LaMnO3. We point out on the example of LaMnO3
that a reliable determination of the experimental microscopic
parameters of spin-orbital models is possible only when results of
magnetic and optical experiments can be combined. (c) 2006 WILEY-VCH
Verlag GmbH & Co. KGaA, Weinheim.