The CDW structure of the m = 4 phosphate bronze
Laboratory of Crystallography, University of Bayreuth -
D-95440 Bayreuth, Germany
Corresponding author: firstname.lastname@example.org
Accepted: 17 November 1999
Low-temperature X-ray diffraction with synchrotron radiation was used to study the CDW structure of the phosphate bronze (PO2)4(WO3) with m=4. The CDW state at can be described as a 2-dimensional, incommensurately modulated structure with wave vectors and . The second type of modulation is found to comprise the mixed second-order satellites at (0.340 (5), 0, 0). Atomic displacements are mainly found on the wolfram atoms, whereby a tendency is observed for the CDW to concentrate in the middle of the WO3 layers. The consequences are derived for the interpretation of the CDW modulations in this homologous series of compounds.
PACS: 71.45.Lr – Charge-density-wave systems / 61.44.Fw – Incommensurate crystals / 64.70.Rh – Commensurate-incommensurate transitions
© EDP Sciences, 2000