Interlayer Josephson coupling for a gas of pancake vortices
Ernst Helmut Brandt, Edouard B. Sonin
DOI 10.1103/PhysRevB.66.064505 · Physical Review B
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Abstract
The dependence of the Josephson interlayer coupling in layered superconductors on the magnetic field H is studied numerically in the limit of complete disorder of the positions of pancake vortices (pancake gas). We find that the spatial average 〈cosφ(r→)〉 is proportional to 1/H1/2, where φ is the gauge-invariant phase difference between two layers. The implication of this result for the interpretation of the magnetoabsorption resonances observed in layered superconductors is discussed.
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