title: Ba3 v2 s4 o3 : a mott insulating frustrated quasi-one-dimensional s=1 magnet.
abstract: Through a solid-state reaction, a practically phase pure powder of Ba3 V2 S4 O3 was obtained. The crystal structure was confirmed by X-ray single-crystal and synchrotron X-ray powder diffraction (P63 , a=10.1620(2), c=5.93212(1) Å). X-ray absorption spectroscopy, in conjunction with multiplet calculations, clearly describes the vanadium in charge-disproportionated V(III) S6 and V(V) SO3 coordinations. The compound is shown to be a strongly correlated Mott insulator, which contradicts previous predictions. Magnetic and specific heat measurements suggest dominant antiferromagnetic spin interactions concomitant with a weak residual ferromagnetic component, and that intrinsic geometric frustration prevents long-range order from evolving.
authors: Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, 01187 Dresden (Germany).
authors: Emily J
authors: EJ
authors: Hopkins
authors: Yurii
authors: Y
authors: Prots
authors: Ulrich
authors: U
authors: Burkhardt
authors: Yves
authors: Y
authors: Watier
authors: Zhiwei
authors: Z
authors: Hu
authors: Chang-Yang
authors: CY
authors: Kuo
authors: Jen-Che
authors: JC
authors: Chiang
authors: Tun-Wen
authors: TW
authors: Pi
authors: Arata
authors: A
authors: Tanaka
authors: Liu Hao
authors: LH
authors: Tjeng
authors: Martin
authors: M
authors: Valldor
keywords: X-ray spectroscopy; magnetic properties; semiconductors; solid-state reactions; vanadium