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Temperature dependence of optical spectral weights in quarter-filled ladder systems

MPS-Authors
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Aichhorn,  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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von der Linden,  W.
Department Quantum Many-Body Theory (Walter Metzner), Max Planck Institute for Solid State Research, Max Planck Society;

/persons/resource/persons279866

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

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Citation

Aichhorn, M., Horsch, P., von der Linden, W., & Cuoco, M. (2002). Temperature dependence of optical spectral weights in quarter-filled ladder systems. Physical Review B, 65(20): 201101.


Cite as: https://hdl.handle.net/21.11116/0000-000E-EE57-5
Abstract
The temperature dependence of the integrated optical
conductivity I(T) reflects the changes of the kinetic energy as
spin and charge correlations develop. We calculated I(T) in the
frame of a t-J-V model for ladder systems, such as alpha(')-
NaV2O5, and show that the measured strong T dependence of I(T)
for NaV2O5 can be explained by the destruction of short-range
antiferromagnetic correlations. Thus I(T) provides detailed
information about the T dependence of superexchange energy and
thereby allows for an independent determination of magnetic
energy scales.