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Topological defects in mixtures of superconducting condensates with different charges
KTH, School of Engineering Sciences (SCI), Theoretical Physics.
KTH, School of Engineering Sciences (SCI), Theoretical Physics, Statistical Physics.
2014 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 89, no 21, 214507- p.Article in journal (Refereed) Published
Abstract [en]

We investigate the topological defects in phenomenological models describing mixtures of charged condensates with commensurate electric charges. Such situations are expected to appear for example in liquid metallic deuterium. This is modeled by a multicomponent Ginzburg-Landau theory where the condensates are coupled to the same gauge field by different coupling constants whose ratio is a rational number. We also briefly discuss the case where electric charges are incommensurate. Flux quantization and finiteness of the energy per unit length dictate that the different condensates have different winding and thus different number of (fractional) vortices. Competing attractive and repulsive interactions lead to molecule-like bound states between fractional vortices. Such bound states have finite energy and carry integer flux quanta. These can be characterized by the CP1 topological invariant that motivates their denomination as skyrmions.

Place, publisher, year, edition, pages
2014. Vol. 89, no 21, 214507- p.
Keyword [en]
Liquid Metallic Deuterium, Vortices, Hydrogen
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-148288DOI: 10.1103/PhysRevB.89.214507ISI: 000338510100003ScopusID: 2-s2.0-84903528073OAI: diva2:736571
Swedish Research CouncilKnut and Alice Wallenberg Foundation

QC 20140807

Available from: 2014-08-07 Created: 2014-08-05 Last updated: 2014-08-07Bibliographically approved

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