Volume 53, Number 1, January 2001
|Page(s)||72 - 78|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 December 2003|
Direct observation of 1-dimensional charge order below the first-order "metal-insulator"transition in
Swiss Light Source, Paul Scherrer Institute - CH-5232 Villigen
2 Chemistry Division, Argonne National Laboratory - Argonne, IL 60439, USA
3 European Synchrotron Radiation Facility - F-38043 Grenoble Cedex, France
4 Department of Material Science and Technology, Niigata University Niigata 950-21, Japan
Accepted: 30 October 2000
Resonant X-ray diffraction results on the Yb absorption edge of are reported. The strong enhancement at the absorption edge of reflections of type at temperatures below the first-order phase transition is viewed as direct evidence of a 1-dimensional charge order. The quantitative determination of the charge ordering, which does not follow the structural distortion, has direct impact on models describing the unusual electronic and magnetic properties of this material.
PACS: 75.30.Mb – Valence fluctuation, Kondo lattice, and heavy-fermion phenomena / 64.60.-i – General studies of phase transitions / 61.10.-i – X-ray diffraction and scattering
© EDP Sciences, 2001
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