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Skyrmions induced by dissipationless drag in U(1)xU(1) superconductors
KTH, School of Engineering Sciences (SCI), Theoretical Physics.ORCID iD: 0000-0001-5087-3115
KTH, School of Engineering Sciences (SCI), Theoretical Physics, Statistical Physics.
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA.
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 10, 104508- p.Article in journal (Refereed) Published
Abstract [en]

Rather generically, multicomponent superconductors and superfluids have intercomponent current-current interaction. We show that in superconductors with substantially strong intercomponent drag interaction, the topological defects which form in an external field are characterized by a skyrmionic topological charge. We then demonstrate that they can be distinguished from ordinary vortex matter by a very characteristic magnetization process due to the dipolar nature of inter-skyrmion forces. The results provide an experimental signature to confirm or rule out the formation p-wave state with reduced spin stiffness in p-wave superconductors.

Place, publisher, year, edition, pages
2014. Vol. 89, no 10, 104508- p.
Keyword [en]
Lattices, Phases, Upt3
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-143682DOI: 10.1103/PhysRevB.89.104508ISI: 000332459900006Scopus ID: 2-s2.0-84897906225OAI: oai:DiVA.org:kth-143682DiVA: diva2:708670
Funder
Swedish Research CouncilKnut and Alice Wallenberg Foundation
Note

QC 20140328

Available from: 2014-03-28 Created: 2014-03-27 Last updated: 2017-12-05Bibliographically approved
In thesis
1. Phase transitions and vortex structures in multicomponent superconductors
Open this publication in new window or tab >>Phase transitions and vortex structures in multicomponent superconductors
2015 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Theoretical aspects of multicomponent superconductivity and systemswith competing interactions are studied using Monte Carlo techniques.Motivated by recent experimental and theoretical results of complex struc-ture formation of vortices in multicomponent systems, possible vortex struc-ture formations due to vortex interactions that are not purely attractive orrepulsive are considered. Vortex structures such as clusters, superclusters,hierarchical structure formation, stripes, gossamer patters, glassy phases, aswell as checkerboard lattices and loops are demonstrated to be possible.The order of the superconducting phase transition is considered for multi-component lattice London superconductors. The phase transition is demon-strated to be either rst-order or continuous depending on the strength of asymmetry-breaking Josephson intercomponent interaction. It is argued thatthe rst-order phase transition is caused by a vortex phase separation due toa uctuation-induced attractive interaction between vortex lines.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2015. 41 p.
Series
TRITA-FYS, ISSN 0280-316X ; 2015:78
Keyword
multicomponent superconductors, superconductivity, phase transitions, monte carlo, vortices, vortex structure formation, competing interactions
National Category
Condensed Matter Physics Physical Sciences
Identifiers
urn:nbn:se:kth:diva-177141 (URN)978-91-7595-758-6 (ISBN)
Presentation
2015-12-07, FB42, AlbaNova universitetscentrum, Roslagstullsbacken 21, Stockholm, 10:00 (English)
Opponent
Supervisors
Note

QC 20151117

Available from: 2015-11-17 Created: 2015-11-16 Last updated: 2015-11-17Bibliographically approved

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Garaud, JulienSellin, Karl A. H.Jäykkä, JuhaBabaev, Egor
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