Evidence for coupling between charge-density-wave and phonons in two-dimensional rare-earth tri-tellurides (original) (raw)

We report on a Raman scattering investigation of the charge-density-wave (CDW), quasi two-dimensional rare-earth tri-tellurides RTe3 (R= La, Ce, Pr, Nd, Sm, Gd and Dy) at ambient pressure, and of LaTe3 and CeTe3 under externally applied pressure. The observed phonon peaks can be ascribed to the Raman active modes for both the undistorted as well as the distorted lattice in

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