We report an x-ray diffraction study on the charge-density-wave (CDW) LaTe3 and CeTe3 compounds as a function of pressure. We extract the lattice constants and the CDW modulation wave vector. We observe that the intensity of the CDW satellite peaks tend to zero with increasing pressure, thus providing direct evidence for a pressure-induced quenching of the CDW phase. Our findings further support the equivalence between chemical and applied pressures in R Te3, put forward by our previous optical investigations, but reveal some subtle differences. We offer a possible explanation for these differences.
Pressure-induced quenching of the charge-density-wave state in rare-earth tritellurides observed by x-ray diffraction / A. Sacchetti, C.L. Condron, S.N. Gvasaliya, F. Pfuner, M. Lavagnini, M. Baldini, M.F. Toney, M. Merlini, M. Hanfland, J. Mesot, J.H. Chu, I.R. Fisher, P. Postorino, L. Degiorgi. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 79:20(2009), pp. 201101.201101-1-201101.201101-4.
Pressure-induced quenching of the charge-density-wave state in rare-earth tritellurides observed by x-ray diffraction
M. Merlini;
2009
Abstract
We report an x-ray diffraction study on the charge-density-wave (CDW) LaTe3 and CeTe3 compounds as a function of pressure. We extract the lattice constants and the CDW modulation wave vector. We observe that the intensity of the CDW satellite peaks tend to zero with increasing pressure, thus providing direct evidence for a pressure-induced quenching of the CDW phase. Our findings further support the equivalence between chemical and applied pressures in R Te3, put forward by our previous optical investigations, but reveal some subtle differences. We offer a possible explanation for these differences.
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