Pressure-induced non-superconducting phase of β-Na0.33V2O5 and the mechanism of high-pressure phase transitions in β-Na0.33V2O5 and β-Li0.33V2O5 at room temperature. (24th December 2015)

• Record Type: Journal Article
• Authors: Grzechnik, A; Ueda, Y; Yamauchi, T; Hanfland, M; Hering, P; Potapkin, V; Friese, K
• Is Part Of: Journal of physics. Volume 28:Number 3(2016)
• Publication Date: 2015-12-24
• Subjects: vanadate bronze -- high pressure -- phase transition -- crystal structure; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/0953-8984/28/3/035401
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: The crystal structure of β -Na0.33 V2 O5 (C2/ m, Z = 6) has been studied on compression to 19 GPa at room temperature using synchrotron single-crystal diffraction in a diamond anvil cell. The vanadate bronze undergoes a phase transition to a non-superconducting phase at about 12 GPa due to changes of polyhedral connectivities in the vanadate framework and due to ordering of the Na + cations. This novel structure (C m, Z = 6) is interpreted as an intermediate stage in the sequence of pressure-induced transformations in the β - A 0.33 V2 O5 bronzes ( A : Li, Na) at room temperature. This study reveals the close relation between the loss of the two-leg ladder V–V system and non-superconducting state of the β - A 0.33 V2 O5 materials.