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Observability of quantum phase fluctuations in cuprate superconductors

Hyok-Jon Kwon·Alan T. Dorsey·P. J. Hirschfeld
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Abstract

We study the order parameter phase fluctuation effects in cuprate superconductors near T=0, using a quasi-two-dimensional d-wave BCS model. An effective phason theory is obtained which is used to estimate the strength of the fluctuations, the fluctuation correction to the in-plane penetration depth, and the pair-field susceptibility. We find that while the phase fluctuation effects are difficult to observe in the renormalization of the superfluid phase stiffness, they may be observed in a pair tunneling experiment which measures the pair-field susceptibility.

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Hyok-Jon Kwon, Alan T. Dorsey, P. J. Hirschfeld. 2001-01-04. Observability of quantum phase fluctuations in cuprate superconductors. https://doi.org/10.1103/physrevlett.86.3875

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