Paramagnetic intrinsic Meissner effect in a bulk
Abstract
We calculate the free energy of a quasi-two-dimensional (Q2D) superconductor with ξ⊥ < d in a parallel magnetic field, where ξ⊥ is a perpendicular to the conducting layer coherence length and d is the interlayer distance. It is shown to be different from that in the famous Lawrence-Doniach model. In particular, at high enough magnetic fields, the Meissner currents are found to create an unexpected paramagnetic moment due to the shrinking of the Cooper pairs “sizes” in a direction perpendicular to the conducting layers. We suggest measuring this paramagnetic intrinsic Meissner effect in Q2D superconductors and superconducting superlattices.
- Publication:
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Soviet Journal of Experimental and Theoretical Physics Letters
- Pub Date:
- October 2008
- DOI:
- 10.1134/S0021364008150125
- Bibcode:
- 2008JETPL..88..201L
- Keywords:
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- 74.20.Rp;
- 74.25.Op;
- 74.70.Kn