Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2001-07-10
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, 4 figures
Scientific paper
10.1103/PhysRevB.66.081104
The nature of insulating state driven by electronic correlations in the quarter-filled ladder compound $\alpha'$NaV$_{2}$O$_{5}$ is investigated within a cluster dynamical mean-field approach. An extended Hubbard model with first-principle tight-binding parameters have been used. It is shown that the insulating state in the charge-disordered phase of this compound is formed due to the transfer of spectral density and dynamical charge fluctuations where for the latter, the role of inter-site Coulomb interaction is found to be of crucial importance.
Anisimov Vladimir I.
Dasgupta Indra
Katsnelson Mikhail I.
Lichtenstein Alexander I.
Mazurenko V. V.
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