Pressure dependence of the optical properties of the charge-density-wave compound LaTe2 (Articolo in rivista)

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  • Pressure dependence of the optical properties of the charge-density-wave compound LaTe2 (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Alternative label
  • Lavagnini, M; Sacchetti, A; Degiorgi, L; Arcangeletti, E; Baldassarre, L; Postorino, P; Lupi, S; Perucchi, A; Shin, KY; Fisher, IR (2008)
    Pressure dependence of the optical properties of the charge-density-wave compound LaTe2
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Lavagnini, M; Sacchetti, A; Degiorgi, L; Arcangeletti, E; Baldassarre, L; Postorino, P; Lupi, S; Perucchi, A; Shin, KY; Fisher, IR (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 77 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • \"[Lavagnini, M.; Sacchetti, A.; Degiorgi, L.] ETH, Festkorperphys Lab, CH-8093 Zurich, Switzerland; [Arcangeletti, E.; Baldassarre, L.; Postorino, P.; Lupi, S.] Univ Roma La Sapienza, CNR INFM Coherentia, I-00185 Rome, Italy; [Arcangeletti, E.; Baldassarre, L.; Postorino, P.; Lupi, S.] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy; [Perucchi, A.] Sincrotrone Trieste, I-34012 Trieste, Italy; [Perucchi, A.] CNR INFM Coherentia, I-34012 Trieste, Italy; [Shin, K. Y.; Fisher, I. R.] Stanford Univ, Geballe Lab Adv Mat, Stanford, CA 94305 USA; [Shin, K. Y.; Fisher, I. R.] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA (literal)
Titolo
  • Pressure dependence of the optical properties of the charge-density-wave compound LaTe2 (literal)
Abstract
  • We report the pressure dependence of the optical response of LaTe2, which is deep in the charge-density-wave (CDW) ground state even at 300 K. The reflectivity spectrum is collected in the midinfrared spectral range at room temperature and at pressures between 0 and 7 GPa. We extract the energy scale due to the single-particle excitation across the CDW gap and the Drude weight. We establish that the gap decreases upon compressing the lattice while the Drude weight increases. This signals a reduction in the quality of nesting upon applying pressure, therefore inducing a lesser impact of the CDW condensate on the electronic properties of LaTe2. The consequent suppression of the CDW gap leads to a release of additional charge carriers, manifested by the shift of weight from the gap feature into the metallic component of the optical response. On the contrary, the power-law behavior, seen in the optical conductivity at energies above the gap excitation and indicating a weakly interacting limit within the Tomonaga-Luttinger liquid scenario, seems to be only moderately dependent on pressure. (literal)
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