Critical current of Josephson-coupled systems in perpendicular fields
L. L. Daemen, L. N. Bulaevskii, M. P. Maley, J. Y. Coulter
DOI 10.1103/PhysRevLett.70.1167 · Physical Review Letters
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Abstract
We calculate the magnetic field and temperature dependence of the critical current density jc along the c axis in Josephson-coupled layered systems when the applied magnetic field is parallel to the c axis. jc decreases with field and temperature because of the thermal fluctuations of the vortices which induce a phase difference across the junctions. The anisotropy ratio γ∝1/ √jc acquires a field and temperature dependence. The decoupling phase transition line above which the superconducting current along the c axis vanishes is determined.
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