Type-1.5 Superconductivity in Multiband and Other Multicomponent Systems
2013 (English)In: Journal of Superconductivity and Novel Magnetism, ISSN 1557-1939, Vol. 26, no 5, 2045-2055 p.Article in journal (Refereed) Published
Usual superconductors are classified into two categories: of type-1 when the ratio of the magnetic field penetration length (lambda) to coherence length (xi) kappa = lambda/xi < 1/root 2 and of type-2 when kappa > 1/root 2. The boundary case kappa = 1/root 2 is also considered to be a special situation, frequently termed as "Bogomolnyi limit". Here we discuss multicomponent systems which can possess three or more fundamental length scales and allow a separate superconducting state, which was recently termed "type-1.5". In that state, a system has the following hierarchy of coherence and penetration lengths xi(1) < root 2 lambda < xi(2). We also briefly overview the works on single-component regime kappa approximate to 1/root 2 and comment on recent discussion by Brandt and Das in the proceedings of the previous conference in this series.
Place, publisher, year, edition, pages
2013. Vol. 26, no 5, 2045-2055 p.
Ginzburg-Landau theory, Type 1.5 superconductivity
IdentifiersURN: urn:nbn:se:kth:diva-129477DOI: 10.1007/s10948-012-1951-0ISI: 000323906600118OAI: oai:DiVA.org:kth-129477DiVA: diva2:652543
FunderKnut and Alice Wallenberg FoundationSwedish Research Council
QC 201310012013-10-012013-09-302013-10-01Bibliographically approved