1998/09/30 by Claudius Gros, Cladius Gros, Roser Valentí +1 · 4 citations
Chemical Engineering · Physics and Astronomy · #Advanced Condensed Matter Physics #Catalysis and Oxidation Reactions #Physics of Superconductivity and Magnetism #cond-mat
paper · pdf · doi:10.1103/physrevlett.82.976
published as Phys. Rev. Lett. 82, 976 (1999) · final version for PRL
arxiv created 1999/01/08 · openalex publication_date 1999/02/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We consider the effects of charge ordering in NaV2O5 (below TSP) on the exchange constants and on the magnon dispersion. We show that the experimentally observed splitting of the magnon branches along the a direction is induced by charge ordering. One can distinguish between the proposed ``zigzag'' and ``in-line'' patterns of charge ordering. Only the zigzag ordering is consistent with the experimental results regarding (i) the unusual intensity modulation observed in magnetic neutron scattering, (ii) the reduction in the intraladder exchange constant below TSP, and (iii) the magnon dispersion along a. We estimate the interladder exchange constant to be 1.01meV\phantom\rule0ex0ex=\phantom\rule0ex0ex11.7K for T>TSP.