Elastic modes, phase fluctuations, and long-range order in type-II superconductors
A. Houghton, Robert A. Pelcovits, A. Sudbø
DOI 10.1103/PhysRevB.42.906 · Physical Review B
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Abstract
We consider the effect of thermal fluctuations on the phase of the superconducting order parameter of the Abrikosov flux-line-lattice state of a type-II superconductor. While in the electrodynamic gauges usually chosen there are apparently divergent phase fluctuations, we show that the gauge-invariant phase has a finite average value. Thus, conventional superconducting long-range order is present in a three-dimensional flux line lattice.
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