Na2V3O7, a frustrated nanotubular system with spin-1/2 diamond rings

Abstract

Following the recent discussion on the puzzling nature of the interactions in the nanotubular system Na2V3O7, we present a detailed ab-initio microscopic analysis of its electronic and magnetic properties. By means of a non-trivial 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.

5 pages, 5 figures. Phys. Rev. Lett. (in press)

References in corpus (4)

• Magnetic light scattering in low-dimensional quantum spin systems
• Soliton binding and low-lying singlets in frustrated odd-legged S=1/2 spin tubes
• Thermodynamic properties of ferromagnetic mixed-spin chain systems
• A low-dimensional spin S = 1/2 system at the quantum critical limit: Na2V2O7

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• Thermal entanglement in the nanotubular system Na_2V_3O_7
• Microscopic modeling of a spin crossover transition
• Proposed low energy model Hamiltonian for spin-gapped system CuTe2O5
• Microscopic model for the novel frustrated Cu(II)-spin tetrahedron-based Cu4Te5O12X4 (X=Cl, Br) systems
• New structural and magnetic aspects of the nanotube system Na2V3O7
• Quantum order by disorder in Frustrated Spin Nanotubes