title: Na2V3O7: a frustrated nanotubular system with spin-1/2 diamond ring geometry.
abstract: Following the recent discussion on the puzzling nature of the interactions in the nanotubular system Na(2)V(3)O(7), we present a detailed ab initio microscopic analysis of its electronic and magnetic properties. By means of a nontrivial downfolding study we propose an effective model in terms of tubes of nine-site rings with the geometry of a spin-diamond necklace with frustrated inter-ring interactions. We show that this model provides a quantitative account of the observed magnetic behavior.
authors.affiliation: S. N. Bose National Centre for Basic Sciences, JD Block, Sector 3, Salt Lake City, Kolkata, India.
authors.forename: T
authors.initials: T
authors.lastname: Saha-Dasgupta
authors.forename: Roser
authors.initials: R
authors.lastname: Valentí
authors.forename: F
authors.initials: F
authors.lastname: Capraro
authors.forename: C
authors.initials: C
authors.lastname: Gros