Theoretical study of the optical conductivity of ${\alpha }^{\prime }-Na{V}_2{O}_5$

Abstract

Using finite temperature diagonalization techniques it is shown that the quarter-filled t-J-V model on a trellis lattice structure provides a quantitative explanation of the highly anisotropic optical conductivity of the ${\alpha }^{\prime }-Na{V}_2{O}_5$ compound. The combined effects of the short-range Coulomb interaction and valence fluctuations of V-ions determine the main absorption and the fundamental gap. Inter-ladder hopping is necessary for the explanation of the anomalous in-gap absorption and generation of spectral weight at high energy. The role of valence fluctuations is explained in terms of the domain wall excitations of an anisotropic 2D Ising model in a transverse field close to criticality.

arXiv comment4 pages, 5 figures

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Cited by in corpus (18)

• Low Temperature Lanczos Method
• Electron Correlation Effects in Resonant Inelastic X-ray Scattering of NaV2O5
• Low temperature ellipsometry of NaV2O5
• Temperature dependence of optical spectral weights in quarter-filled ladder systems
• Optical properties and electronic structure of Ca-doped alpha'-NaV2O5
• Mott-Hubbard versus charge-transfer behavior in LaSrMnO4 studied via optical conductivity
• Nature of insulating state in NaV${}_2$O${}_5$ above charge-ordering transition: a cluster DMFT study
• High frequency ESR investigation on dynamical charge disproportionation and spin gap excitation in NaV_2O_5
• One-dimensional dynamics of the d-electrons in ${\alpha }^{\prime }$-NaV${}_2$O${}_5$
• Optical properties of NaxV2O5
• Low-energy excitations in NaV2O5
• Charge-ordering and optical transitions of LiV2O5 and NaV2O5
• Charge ordering in quarter-filled ladder systems coupled to the lattice
• Single-particle spectral function of quarter-filled ladder systems
• Charge excitations in NaV${}_2$O${}_5$
• Spin and charge excitations in the anisotropic Hubbard ladder at quarter filling with charge-ordering instability
• Charge order induced by electron-lattice interaction in NaV2O5
• Isospin model for suppression of charge order in hole- doped NaV_2O_5