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Superconductivity between standard types : Multiband versus single-band materials

Title data

Vagov, Alexei ; Shanenko, A. A. ; Milošević, M. V. ; Axt, Vollrath M. ; Vinokur, V. M. ; Aguiar, J. Albino ; Peeters, F. M.:
Superconductivity between standard types : Multiband versus single-band materials.
In: Physical Review B. Vol. 93 (2016) Issue 17 . - Art.Nr. 174503, 15 S..
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.93.174503

Project information

Project financing: Supported by Brazilian agencies CNPq (Grants No. 307552/2012-8 and No. 141911/2012-3) and FACEPE (Grant No. APQ-0589-1.05/08) and by the U.S. Department of Energy, Office of Science, Materials Sciences and Engineering Division.

Abstract in another language

In the nearest vicinity of the critical temperature, types I and II of conventional single-band superconductors interchange at the Ginzburg-Landau parameter κ=1/√2. At lower temperatures this point unfolds into a narrow but finite interval of κ's, shaping an intertype (transitional) domain in the (κ,T) plane. In the present work, based on the extended Ginzburg-Landau formalism, we show that the same picture of the two standard types with the transitional domain in between applies also to multiband superconductors. However, the intertype domain notably widens in the presence of multiple bands and can become extremely large when the system has a significant disparity between the band parameters. It is concluded that many multiband superconductors, such as recently discovered borides and iron-based materials, can belong to the intertype regime.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: superconductivity; multiband superconductor; BCS; extended Landau Ginzburg theory; intertype superconductivity; exotic superconductors
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III > Chair Theoretical Physics III - Univ.-Prof. Dr. Martin Axt
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 06 Nov 2017 12:31
Last Modified: 06 Nov 2017 12:31
URI: https://eref.uni-bayreuth.de/id/eprint/40292