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Spontaneous pattern formation in superconducting films

Title data

Córdoba-Camacho, W. Y. ; da Silva, R. M. ; Shanenko, A. A.. ; Vagov, Alexei ; Vasenko, A. S. ; Lvov, B. G. ; Albino Aguiar, J.:
Spontaneous pattern formation in superconducting films.
In: Journal of Physics: Condensed Matter. Vol. 32 (February 2020) Issue 7 . - Art.Nr. 075403.
ISSN 1361-648X
DOI: https://doi.org/10.1088/1361-648X/ab5379

Abstract in another language

Superconducting films are usually regarded as type II superconductors even when they are made of a type I material. The reason is the presence of stray magnetic fields that stabilize the vortex matter by inducing long-range repulsive interactions between vortices. While very thin films indeed reach this limit, there is a large interval of thicknesses where magnetic properties of superconducting films cannot be classified as either of the two conventional superconductivity types. Recent calculations revealed that in this interval the system exhibits spontaneous formation of magnetic flux-condensate patterns and superstructures appearing due to the interplay between the long-range stray field effects and proximity to the Bogomolnyi self-duality point. These calculations were based on the periodic in-plane boundary conditions which, as is well known from classical electrodynamics, for systems with long-range interactions can lead to field distortions and considerable discrepancies between results of different calculation methods. Here we demonstrate that similar spontaneous patterns are obtained for superconducting films with open in-plane boundary conditions (vanishing in-plane currents perpendicular to the edges of the finite film) and thus the phenomenon is not an artefact of chosen boundary conditions.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Professorship Theoretical Physics III
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 15 Feb 2021 13:01
Last Modified: 15 Feb 2021 13:01
URI: https://eref.uni-bayreuth.de/id/eprint/63067