Tilting the balance towards d-wave in iron-based superconductors

2017/04/18 by Mario Fink, Ronny Thomale, Fink, Mario +1
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Iron-based superconductors research #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #Superconductivity (cond-mat.supr-con)

paper · pdf · doi:10.48550/arxiv.1704.05525

openalex publication_date 2017/04/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The intricate interplay of interactions and Fermiology can give rise to a close competition between nodeless (e.g. s-wave) and nodal (e.g. d-wave) order in electronically driven unconventional superconductors. We analyze how such a scenario is affected by a Zeeman magnetic field H_Z and temperature T. In the neighborhood of a zero temperature first order critical point separating a nodal from a nodeless phase, the phase boundary at low H_Z and/or low T has a universal line shape cubic in H_Z or T, such that the nodal state is stabilized at the expense of the nodeless. We calculate this line shape for a model of competing s_±-wave and d-wave pairing in iron-based superconductors.

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