Pairing fluctuations in cuprate superconductors: universal properties and trends

Toni Schneider

doi:10.1117/12.179143

29 June 1994 Pairing fluctuations in cuprate superconductors: universal properties and trends

Toni Schneider

Proceedings Volume 2157, Superconducting Superlattices and Multilayers; (1994) https://doi.org/10.1117/12.179143
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

The effects of thermal pairing fluctuations on the phase transition in extreme type II superconductors with pronounced uniaxial anisotropy are examined in zero magnetic field. Approaching T_c from below, there is the crossover from quasi-2D to 3D xy-behavior, which belongs to the universality class of an uncharged superfluid. Because phase fluctuations destroy long-range order in strictly 2D systems the fluctuation dominated regime is rather large. Approaching from above, the same crossover occurs, but in this regime the fluctuations in the magnitude of the pairing field dominate. Using the Gaussian approximation we obtain the relevant correlation lengths and show the importance of fluctuations and anisotropy.

Citation Download Citation

Toni Schneider "Pairing fluctuations in cuprate superconductors: universal properties and trends", Proc. SPIE 2157, Superconducting Superlattices and Multilayers, (29 June 1994); https://doi.org/10.1117/12.179143

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