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Vortex state in double transition superconductors

Yasushi Matsunaga·Masanori Ichioka·Kazushige Machida
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Abstract

Novel vortex phase and nature of 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 degree 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 fields. These characters are important to identify the multiple superconducting phase in PrOs_4_Sb_12.

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Yasushi Matsunaga, Masanori Ichioka, Kazushige Machida. 2004-02-19. Vortex state in double transition superconductors. https://doi.org/10.1103/physrevlett.92.157001

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