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Title: In-plane magnetic field versus temperature phase diagram of a quasi-2D frustrated multiband superconductor
Authors: Marques, Anselmo
Dias, Ricardo
Araújo, Miguel
Santos, F
Keywords: multiband superconductivity
Zeeman splitting
Issue Date: 13-Mar-2015
Publisher: IOP Publishing
Citation: Supercond. Sci. Technol. 28 (2015) 045021
Abstract: Motivated by the recent discovery of iron-based superconductors, with high critical temperatures and multiple bands crossing the Fermi level, we address the conditions for the presence of chiral superconducting phases configurations in the in-plane magnetic field versus temperature phase diagram of a quasi-2D frustrated three-band superconductor. Due to Zeeman splitting, the coupled superconducting gap equations present a complex set of solutions. For weak interband couplings, chiral configurations are only attained in a narrow strip of the in-plane magnetic field versus temperature phase diagram. This strip of chiral states becomes narrower and disappears at low temperatures, giving way to a first-order transition between non-chiral superconducting states. For stronger interband couplings, the chiral strip is much broader, if the interband couplings are approximately equal; otherwise, the chiral region is expected to be completely absent of the phase diagram.
Type: article
Appears in Collections:FIS - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica

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