Raman scattering evidence for a cascade-like evolution of the charge-density-wave collective amplitude mode

M. Lavagnini; H. -M. Eiter; L. Tassini; B. Muschler; R. Hackl; R. Monnier; J. -H. Chu; I. R. Fisher; L. Degiorgi

doi:10.1103/PhysRevB.81.081101

Raman scattering evidence for a cascade-like evolution of the charge-density-wave collective amplitude mode

Strongly Correlated Electrons 2015-05-14 v1

Authors: M. Lavagnini , H. -M. Eiter , L. Tassini , B. Muschler , R. Hackl , R. Monnier , J. -H. Chu , I. R. Fisher , L. Degiorgi

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Abstract

The two-dimensional rare-earth tri-tellurides undergo a unidirectional charge-density-wave (CDW) transition at high temperature and, for the heaviest members of the series, a bidirectional one at low temperature. Raman scattering experiments as a function of temperature on DyTe $_3$ and on LaTe $_3$ at 6 GPa provide a clear-cut evidence for the emergence of the respective collective CDW amplitude excitations. In the unidirectional CDW phase, we surprisingly discover that the amplitude mode develops as a succession of two mean-field, BCS-like transitions in different temperature ranges.

Keywords

charge-density-wave amplitude mode Raman scattering rare-earth tri-tellurides BCS-like transition unidirectional CDW

Cite

@article{arxiv.0909.1289,
  title  = {Raman scattering evidence for a cascade-like evolution of the charge-density-wave collective amplitude mode},
  author = {M. Lavagnini and H. -M. Eiter and L. Tassini and B. Muschler and R. Hackl and R. Monnier and J. -H. Chu and I. R. Fisher and L. Degiorgi},
  journal= {arXiv preprint arXiv:0909.1289},
  year   = {2015}
}

Raman scattering evidence for a cascade-like evolution of the charge-density-wave collective amplitude mode

Abstract

Keywords

Cite

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