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Publication Detail
Field dependent coherence length in the superclean, high-κ superconductor CeCoIn5
Abstract
Using small-angle neutron scattering, we have studied the flux-line lattice (FLL) in the superclean, high-κ superconductor CeCoIn5. The FLL undergoes a first-order symmetry and reorientation transition at ∼0.55T at 50 mK. In addition, the FLL form factor in this material is found to be independent of the applied magnetic field, in striking contrast to the exponential decrease usually observed in superconductors. This result is consistent with a strongly field-dependent coherence length, proportional to the vortex separation. © 2006 The American Physical Society.
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