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Proceedings Paper

Decoupling the superconducting condensate from phonons in the far-infrared spectra of YBa2Cu3O7-x
Author(s): Ricardo P. S. M. Lobo; Francisco J. Gotor; Philippe Odier; Francois Gervais
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Paper Abstract

The infrared reflection spectra of a YBa2Cu3O7-(delta ) single crystal with a large surface containing the c-axis have been recorded from 4 k to room temperature. Thermal treatment of the sample allowed us to obtain spectra for several Tcs, ranging from 50 to 91.3 K on the same sample. The obtained results along the c-axis show an extra band in the superconducting phase which can be attributed to the formation of Cooper pairs. By decoupling this extra absorption from phonons and unpaired charge carries, we have determined the thermal evolution of the London penetration depth and the concentration of pairs along the c-axis as a function of Tc. The observed effects are compared to the BCS theory.

Paper Details

Date Published: 10 June 1996
PDF: 8 pages
Proc. SPIE 2696, Spectroscopic Studies of Superconductors, (10 June 1996); doi: 10.1117/12.241748
Show Author Affiliations
Ricardo P. S. M. Lobo, Ctr. de Recherches sur la Physique des hautes Temperatures/CNRS (France)
Francisco J. Gotor, Ctr. de Recherches sur la Physique des Hautes Temperatures/CNRS (France)
Philippe Odier, Ctr. de Recherches sur la Physique des hautes Temperatures/CNRS (France)
Francois Gervais, Ctr. de Recherches sur la Physique des Hautes Temperatures/CNRS (France)


Published in SPIE Proceedings Vol. 2696:
Spectroscopic Studies of Superconductors
Ivan Bozovic; Dirk van der Marel, Editor(s)

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