Comment on "Ginzburg-Landau theory of two-band superconductors: Absence of type-1.5 superconductivity"
2012 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 86, no 1, 016501- p.Article in journal, Editorial material (Other academic) Published
The recent paper by V. G. Kogan and J. Schmalian [Phys. Rev. B 83, 054515 (2011)] argues that the widely used two-component Ginzburg-Landau (GL) models are not correct, and further concludes that in the regime which is described by a GL theory there could be no disparity in the coherence lengths of two superconducting components. This would in particular imply that [in contrast to U(1) x U(1) superconductors] there could be no "type-1.5" superconducting regime in U(1) multiband systems for any finite interband coupling strength. We point out that these claims are incorrect and based on an erroneous scheme of reduction of a two-component GL theory.
Place, publisher, year, edition, pages
2012. Vol. 86, no 1, 016501- p.
2-Gap Superconductors, Hydrogen, Vortices
IdentifiersURN: urn:nbn:se:kth:diva-100161DOI: 10.1103/PhysRevB.86.016501ISI: 000306088300011ScopusID: 2-s2.0-84863709679OAI: oai:DiVA.org:kth-100161DiVA: diva2:543043
QC 201208062012-08-062012-08-062012-08-06Bibliographically approved