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

Abstract:

The upper critical field of multiband superconductors is an important quantity that can reveal details about the nature of the superconducting pairing. Here we experimentally map out the complete upper-critical-field phase diagram of a stoichiometric superconductor, CaKFe4As4, up to 90 T for different orientations of the magnetic field and at temperatures down to 4.2K. The upper critical fields are extremely large, reaching values close to ∼3 Tc at the lowest temper...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher:
American Physical Society Publisher's website
Journal:
Physical Review B Journal website
Volume:
101
Article number:
134502
Publication date:
2020-04-07
Acceptance date:
2020-03-02
DOI:
EISSN:
2469-9969
ISSN:
2469-9950
Pubs id:
1090714
Local pid:
pubs:1090714
Language:
English
Keywords:

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