Author:

Keywords:

submillimeter waves, conductivity, dielectric permittivity, LSCO, superconductivity, BY-BLOCK DEPOSITION, ELECTROCHEMICAL OXIDATION, OPTICAL-PROPERTIES, COHERENCE PEAK, SUPERCONDUCTORS, YBA2CU3O6.95, BEHAVIOR, STATE, GAP, NBN, Science & Technology, Physical Sciences, Physics, Condensed Matter, Physics, PENETRATION DEPTH, SUPERCONDUCTIVITY, 0204 Condensed Matter Physics, 0206 Quantum Physics, 0303 Macromolecular and Materials Chemistry, General Physics, 5104 Condensed matter physics

Abstract:

We present the first wide-band (5-400 cm(-1)) measurements of the dynamical conductivity and the dielectric permittivity spectra of La2-xSrxCuO4 (x approximate to 0.16). A narrow Drude-like band is observed in the spectra, which is consistent with a d-wave pairing state. We determine the plasma frequency, scattering rate, and mean free path of the unpaired charge carriers responsible for this band. For the first time, "coherence peak"-like behavior is observed in the temperature dependence of the submillimeter conductivity of La2-xSrxCuO4, associated with the temperature evolution of the band in the superconducting state. Published by Elsevier Science B.V.