2001/06/30 by A. Hübsch, A. Huebsch, C. Waidacher +1
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Ga2O3 and related materials #Physics of Superconductivity and Magnetism #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.64.241103
published as Phys. Rev. B 64, 241103(R) (2001)
arxiv created 2001/08/03 · openalex publication_date 2001/12/10 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We calculate the optical conductivity of LiV2O5 and NaV2O5 using exact numerical diagonalization of a quarter-filled extended Hubbard model on a system of coupled ladders. In particular, electronic correlations are treated exactly, and a quantitative agreement between calculated and experimentally observed optical conductivity of these two vanadium oxides is presented. Furthermore, it is found that LiV2O5 differs from NaV2O5 not only in the charge ordering pattern but also in the nature of the interladder coupling: In contrast to LiV2O5, in NaV2O5 neighboring ladders are coupled by a strong Coulomb repulsion, and not by interladder hopping.