2004/03/10 by C. Gros, Claudius Gros, Gennady Y. Chitov
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Organic and Molecular Conductors Research #Physics of Superconductivity and Magnetism #cond-mat.str-el
paper · pdf · doi:10.1209/epl/i2004-10361-8
published as Europhys. Lett. Vol. 69, 447 (2005).
arxiv created 2004/03/10 · openalex publication_date 2005/01/20 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
We present microscopic estimates for the spin-spin and spin-pseudospin interactions of the quarter-filled ladder compound NaV 2 O 5 , obtained by exactly diagonalizing appropriate clusters of the underlying generalized Hubbard Hamiltonian. We present evidence for a substantial interladder spin-pseudospin interaction term which would allow simultaneously for the superantiferroelectric (SAF) charge (pseudospin) ordering and spin dimerization. We discuss the values of the coupling constants appropriate for NaV 2 O 5 and deduce the absence of a soft antiferroelectric mode.