Structural aspects of the metal-insulator transition in BaVS3

A sequence of structural transitions occurring in the quasi-one-dimensional (1D) 3d1 system BaVS3 at low temperature was investigated by high resolution synchrotron X-ray diffraction. The orthorhombic Cmc21 structure of the intermediate-temperature (70K < T < 240K) phase was confirmed. A model...

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Published inSolid state sciences Vol. 7; no. 6; pp. 718 - 725
Main Authors FAGOT, S, FOURY-LEYLEKIAN, P, RAVY, S, POUGET, J. P, ANNE, M, POPOV, G, LOBANOV, M. V, GREENBLATT, M
Format Journal Article
LanguageEnglish
Published Paris Elsevier 01.06.2005
Subjects
Condensed matter: structure, mechanical and thermal properties
Crystalline state (including molecular motions in solids)
Exact sciences and technology
Physics
Structure of solids and liquids; crystallography
Structure of specific crystalline solids
Theory of crystal structure, crystal symmetry; calculations and modeling
Temperature
Symmetry property
Phase transformations
Metal-insulator transition
Bond order wave
XRD
High temperature
Crystal symmetry
Unit cell
Superstructure
Charge density waves
Orthorhombic lattices
Synchrotron radiation
Low temperature
Crystal structure
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Summary:A sequence of structural transitions occurring in the quasi-one-dimensional (1D) 3d1 system BaVS3 at low temperature was investigated by high resolution synchrotron X-ray diffraction. The orthorhombic Cmc21 structure of the intermediate-temperature (70K < T < 240K) phase was confirmed. A model for the low-T (T < 70K) superstructure (with Im symmetry) is proposed and refined. The formation of the superstructure is associated with the stabilization of a mixed bond order/charge density wave.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1293-2558
1873-3085
DOI:10.1016/j.solidstatesciences.2004.11.017