Theory of morphotropic transformations in vanadium oxides

Katzke, H., Toledano, P. and Depmeier, W. (2003) Theory of morphotropic transformations in vanadium oxides Physical Review B, 68 (2). DOI 02410910.1103/PhysRevB.68.024109.

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A theory of the morphotropic transformations occurring between stoichiometric phases in the vanadium-oxide system is proposed. The interconnections between the different structures are shown to result from definite symmetry-breaking mechanisms from a common parent structure. The homologous series VnO2n-1 and VnO2n+1 are interpreted as sequences of lock-in commensurate phases. Identification of the order-parameter symmetries provides us with the form of the thermodynamic functions which allow for construction of the theoretical phase diagrams in which the different phases are inserted. The general procedure allowing for the description of morphotropic transformations is outlined.

Document Type: Article
Keywords: concentration wave approach metal-insulator transition pairwise interaction-model phase-transitions crystal-structure structural aspects order-parameter solid-solutions vno2n-1 refinement
Research affiliation: Kiel University
DOI etc.: 02410910.1103/PhysRevB.68.024109
ISSN: 1098-0121
Date Deposited: 24 Jan 2012 06:42
Last Modified: 08 Oct 2012 10:35

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