Vortex state in double transition superconductors.

Phys Rev Lett

Department of Physics, Okayama University, Okayama 700-8530, Japan.

Published: April 2004

The novel vortex phase and nature of the double transition field are investigated by two-component Ginzburg-Landau theory in a situation where fourfold-twofold symmetric superconducting double transition occurs. The deformation from 60 degrees triangular vortex lattice and a possibility of the vortex sheet structure are discussed. In the presence of the gradient coupling, the transition changes to a crossover at finite field. These characters are important to identify the multiple superconducting phase in PrOs4Sb12.

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http://dx.doi.org/10.1103/PhysRevLett.92.157001DOI Listing

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