Experimental implications of quantum phase fluctuations in layered superconductors

Details Experimental implications of quantum phase fluctuations in layered superconductors Experimental implications of quantum phase fluctuations in layered superconductors

2000-12-11

arxiv.org/abs/cond-mat/0012173v2

Phys. Rev. B, vol 65, pg 104521 (2002)

Physics

Condensed Matter

Superconductivity

6 pgs, 1 figure, minor changes in comparison with c-axis expt, final published version

Scientific paper

10.1103/PhysRevB.65.104521

I study the effect of quantum and thermal phase fluctuations on the in-plane and c-axis superfluid stiffness of layered d-wave superconductors. First, I show that quantum phase fluctuations in the superconductor can be damped in the presence of external screening of Coulomb interactions, and suggest an experiment to test the importance of these fluctuations, by placing a metal in close proximity to the superconductor to induce such screening. Second, I show that a combination of quantum phase fluctuations and the linear temperature dependence of the in-plane superfluid stiffness leads to a linear temperature dependence of the c-axis penetration depth, below a temperature scale determined by the magnitude of in-plane dissipation.

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