2000/08/31 by Simon Trebst, Anirvan M. Sengupta, Anirvan Sengupta · 3 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Transition Metal Oxide Nanomaterials #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.62.r14613
published as Phys. Rev. B 62, R14613 (2000). · 4 pages, 4 figures, added a calculation of level repulsion
arxiv created 2000/10/06 · openalex publication_date 2000/12/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We discuss magnetic excitations of a spin-cluster model which has been suggested to describe the low-temperature phase of \ensuremathα^\ensuremath'\ensuremath-NaV2O5. This model fulfills all symmetry criteria proposed by recent x-ray investigations. We find that this model is not able to describe the occurrence of two well separated magnon lines perpendicular to the ladder direction as observed in inelastic neutron scattering experiments. We suggest further experimental analysis to generally distinguish between models with double reflection or inversion symmetry.