Paramagnetic Effects on the Vortex Lattice of the Unconventional Superconductor CeCoIn5
Abstract
We expose an analysis of the magnetic field distribution in the Abrikosov lattice of high-kappa superconductors with d-wave pairing in the case where the critical field is mainly determined by the Pauli limit and the superfluid currents mainly come from the paramagnetic interaction of electron spins with the local magnetic field. The result found in frame of the generalized Clem variational approach is compatible with the recent observation that the form factor in CeCoIn5 increases with increasing field and then decreases at the approach of Hc2. (A. D. Bianchi et al., Science vol. 319, 177 (2008)).
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