Evidence for coupling between charge density waves and phonons in two-dimensional rare-earth tritellurides (Articolo in rivista)

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  • Evidence for coupling between charge density waves and phonons in two-dimensional rare-earth tritellurides (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.78.201101 (literal)
Alternative label
  • Lavagnini, M; Baldini, M; Sacchetti, A; Castro, D; Delley, B; Monnier, R; Chu, JH; Ru, N; Fisher, IR; Postorino, P; Degiorgi, L (2008)
    Evidence for coupling between charge density waves and phonons in two-dimensional rare-earth tritellurides
    in Physical review. B, Condensed matter and materials physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Lavagnini, M; Baldini, M; Sacchetti, A; Castro, D; Delley, B; Monnier, R; Chu, JH; Ru, N; Fisher, IR; Postorino, P; Degiorgi, L (literal)
Pagina inizio
  • 201101 (literal)
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  • 78 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 4 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • \"[Lavagnini, M.; Sacchetti, A.; Monnier, R.; Degiorgi, L.] ETH, Festkorperphys Lab, CH-8093 Zurich, Switzerland; [Baldini, M.; Di Castro, D.; Postorino, P.] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy; [Baldini, M.; Di Castro, D.; Postorino, P.] Univ Roma La Sapienza, CNR INFM Coherentia, I-00185 Rome, Italy; [Delley, B.] Paul Scherrer Inst, CH-5232 Villigen, Switzerland; [Chu, J. -H.; Ru, N.; Fisher, I. R.] Stanford Univ, Geballe Lab Adv Mat, Stanford, CA 94305 USA; [Chu, J. -H.; Ru, N.; Fisher, I. R.] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA (literal)
Titolo
  • Evidence for coupling between charge density waves and phonons in two-dimensional rare-earth tritellurides (literal)
Abstract
  • We report on a Raman-scattering investigation of the charge density wave (CDW), quasi-two-dimensional rare-earth tritellurides 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 and the distorted lattices in the CDW state by means of a first-principles calculation. The latter also predicts the Kohn anomaly in the phonon dispersion, driving the CDW transition. The integrated intensity of the two most prominent modes scales as a characteristic power of the CDW-gap amplitude upon compressing the lattice, which provides clear evidence for the tight coupling between the CDW condensate and the vibrational modes. (literal)
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