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Title
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Crossband versus intraband pairing in superconductors: signatures and consequences of the interplay
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Author
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Abstract
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| We analyze the paradigmatic competition between intraband and crossband Cooper-pair formation in twoband superconductors, neglected in most works to date. We derive the phase-sensitive gap equations and describe the crossover between the intraband-dominated and the crossband-dominated regimes, delimited by a "gapless" state. Experimental signatures of crosspairing comprise notable gap splitting in the excitation spectrum, non-BCS behavior of gaps versus temperature, as well as changes in the pairing symmetry as a function of temperature. The consequences of these findings are illustrated on the examples of MgB2 and Ba0.6K0.4Fe2As2. |
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Language
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English
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Source (journal)
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Physical review B / American Physical Society. - New York, N.Y, 2016, currens
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Publication
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New York, N.Y
:
American Physical Society
,
2020
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ISSN
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2469-9969
[online]
2469-9950
[print]
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DOI
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10.1103/PHYSREVB.101.094516
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Volume/pages
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101
:9
(2020)
, p. 1-7
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Article Reference
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094516
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ISI
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000522074900002
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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