Critical Behavior of Layered Superconducting Films in Parallel Magnetic Field

Details Critical Behavior of Layered Superconducting Films in Parallel Magnetic Field Critical Behavior of Layered Superconducting Films in Parallel Magnetic Field

1997-10-13

arxiv.org/abs/cond-mat/9710116v2

Physics

Condensed Matter

Superconductivity

20 pgs PLAIN TeX, 2 postscript figs., expanded into article to appear in Physical Review B, Vol. 58

Scientific paper

10.1103/PhysRevB.58.944

The equilibrium magnetization for layered superconducting films that experience a nonzero component, $H_{\parallel}$, of magnetic field applied parallel to the layers is computed at temperatures and at perpendicular field components in the vicinity of the decoupling transition. A fermion analogy is exploited for this purpose, whereby it is found that the parallel magnetization shows an anomalous $H_{\parallel}^{-1}$ tail at high fields due to entropic fluctuations of the (parallel) lattice of Josephson vortices. A collective pinning effect is also identified for $c$-axis transport limited by a single planar defect oriented parallel to both $c$ and to the applied magnetic field.

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