22 December 1998 Time-resolved optical response in BSCCO-2212
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The dynamics of the optical response of BSCCO-2212 measured at 1.5 eV has been investigated using femtosecond spectroscopy. The temperature dependence of the response shows three distinct regimes: (1) T less than Tc: with increasing temperature the differential reflectance, (Delta) R/R greater than 0, decreases to zero at Tc, similar to the behavior of the BCS gap function, and the relaxation rate increases linearly with temperature. (2) Tc less than T less than T* (T* - Tc approximately 35 K): (Delta) R/R less than 0. (3) T greater than T*: a weak, positive (Delta) R/R response is measured in the metallic phase. The intermediate regime observed here coincides with the pseudo gap phase detected in ARPES measurements.
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Pierre Gay, Pierre Gay, Christopher J. Stevens, Christopher J. Stevens, David C. Smith, David C. Smith, John F. Ryan, John F. Ryan, Guang Yang, Guang Yang, J. S. Abell, J. S. Abell, } "Time-resolved optical response in BSCCO-2212", Proc. SPIE 3481, Superconducting and Related Oxides: Physics and Nanoengineering III, (22 December 1998); doi: 10.1117/12.335912; https://doi.org/10.1117/12.335912

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