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

2001/08/28 by Markus Aichhorn, Peter Horsch, Wolfgang von der Linden +1 · 5 citations
Physics and Astronomy · #Advanced Condensed Matter Physics #Atomic and Subatomic Physics Research #Physics of Superconductivity and Magnetism #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.65.201101

published as Phys. Rev. B 65, 201101(R) (2002) · 4 pages, 5 figures

arxiv created 2001/08/28 · openalex publication_date 2002/05/08 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

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\ensuremath-J\ensuremath-V model for ladder systems, such as \ensuremathα^\ensuremath'\ensuremath-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.

Citations

• Spin-Singlet Clusters in the Ladder CompoundNaV2O5
• Charge ordering and opening of spin gap in NaV2O5
• Two soluble models of an antiferromagnetic chain

Cited by

• Domain-wall excitations and optical conductivity in one-dimensional Wigner lattices
• Charge ordering in quarter-filled ladder systems coupled to the lattice
• Temperature-dependent optical conductivity of undoped cuprates with weak exchange
• Single-particle spectral function of quarter-filled ladder systems
• Low-energy Mott-Hubbard excitations inLaMnO3probed by optical ellipsometry