Competing pairing interactions responsible for the large upper critical field in a stoichiometric iron-based superconductor CaKFe4As4

<p>The upper critical field of multiband superconductors is an important quantity that can reveal details about&nbsp;the nature of the superconducting pairing. Here we experimentally map out the complete upper-critical-field&nbsp;phase diagram of a stoichiometric superconductor, CaKFe4...

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Bibliographic Details
Main Authors: Bristow, M, Knafo, W, Reiss, P, Meier, W, Canfield, PC, Blundell, SJ, Coldea, AI
Format: Journal article
Language:English
Published: American Physical Society 2020