---
res:
  bibo_abstract:
  - We introduce a multi-band BCS free energy functional and prove that for a multi-band
    superconductor the effect of inter-band coupling can only increase the critical
    temperature, irrespective of its attractive or repulsive nature and its strength.
    Further, for weak coupling and weaker inter-band coupling, we prove that the dependence
    of the increase in critical temperature on the inter-band coupling is (1) linear,
    if there are two or more equally strongly superconducting bands, or (2) quadratic,
    if there is only one dominating band.@eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Sven Joscha
      foaf_name: Henheik, Sven Joscha
      foaf_surname: Henheik
      foaf_workInfoHomepage: http://www.librecat.org/personId=31d731d7-d235-11ea-ad11-b50331c8d7fb
    orcid: 0000-0003-1106-327X
  - foaf_Person:
      foaf_givenName: Edwin
      foaf_name: Langmann, Edwin
      foaf_surname: Langmann
  - foaf_Person:
      foaf_givenName: Asbjørn Bækgaard
      foaf_name: Lauritsen, Asbjørn Bækgaard
      foaf_surname: Lauritsen
      foaf_workInfoHomepage: http://www.librecat.org/personId=e1a2682f-dc8d-11ea-abe3-81da9ac728f1
    orcid: 0000-0003-4476-2288
  bibo_doi: 10.1007/s00023-026-01706-y
  dct_date: 2026^xs_gYear
  dct_isPartOf:
  - http://id.crossref.org/issn/1424-0637
  - http://id.crossref.org/issn/1424-0661
  dct_language: eng
  dct_publisher: Springer Nature@
  dct_title: Multi-band superconductors have enhanced critical temperatures@
...