Pressure-induced quenching of the charge-density-wave state observed by x-ray diffraction

Details Pressure-induced quenching of the charge-density-wave state observed by x-ray diffraction Pressure-induced quenching of the charge-density-wave state observed by x-ray diffraction

2008-11-03

arxiv.org/abs/0811.0338v1

Phys. Rev. B79, 201101(R) (2009)

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

We report an x-ray diffraction study on the charge-density-wave (CDW) LaTe$_3$ and CeTe$_3$ compounds as a function of pressure. We extract the lattice constants and the CDW modulation wave-vector, and provide direct evidence for a pressure-induced quenching of the CDW phase. We observe subtle differences between the chemical and mechanical compression of the lattice. We account for these with a scenario where the effective dimensionality in these CDW systems is dependent on the type of lattice compression and has a direct impact on the degree of Fermi surface nesting and on the strength of fluctuation effects.

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