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10 June 1996 Decoupling the superconducting condensate from phonons in the far-infrared YBa2Cu3O7-(delta
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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.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ricardo P. S. M. Lobo, Francisco J. Gotor, Philippe Odier, and Francois Gervais "Decoupling the superconducting condensate from phonons in the far-infrared YBa2Cu3O7-(delta", Proc. SPIE 2696, Spectroscopic Studies of Superconductors, (10 June 1996); https://doi.org/10.1117/12.241748
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