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Superconductivity between standard types : Multiband versus single-band materials

Titelangaben

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. Bd. 93 (2016) Heft 17 . - Art.Nr. 174503, 15 S..
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.93.174503

Angaben zu Projekten

Projektfinanzierung: 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 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.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Keywords: superconductivity; multiband superconductor; BCS; extended Landau Ginzburg theory; intertype superconductivity; exotic superconductors
Institutionen der Universität: Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut
Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut > Lehrstuhl Theoretische Physik III > Lehrstuhl Theoretische Physik III - Univ.-Prof. Dr. Martin Axt
Fakultäten
Fakultäten > Fakultät für Mathematik, Physik und Informatik
Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut > Lehrstuhl Theoretische Physik III
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 530 Physik
Eingestellt am: 06 Nov 2017 12:31
Letzte Änderung: 06 Nov 2017 12:31
URI: https://eref.uni-bayreuth.de/id/eprint/40292