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Properties of skyrmions and multi-quanta vortices in chiral p-wave 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.
2015 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 5, 17540Article in journal (Refereed) Published
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Abstract [en]

Chiral p-wave superconducting state supports a rich spectrum of topological excitations different from those in conventional superconducting states. Besides domain walls separating different chiral states, chiral p-wave state supports both singular and coreless vortices also interpreted as skyrmions. Here, we present a numerical study of the energetic properties of isolated singular and coreless vortex states as functions of anisotropy and magnetic field penetration length. In a given chiral state, single quantum vortices with opposite winding have different energies and thus only one kind is energetically favoured. We find that with the appropriate sign of the phase winding, two-quanta (coreless) vortices are always energetically preferred over two isolated single quanta (singular) vortices. We also report solutions carrying more flux quanta. However those are typically more energetically expensive/metastable as compared to those carrying two flux quanta.

Place, publisher, year, edition, pages
Nature Publishing Group, 2015. Vol. 5, 17540
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Physical Sciences
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URN: urn:nbn:se:kth:diva-180222DOI: 10.1038/srep17540ISI: 000365689800002PubMedID: 26631985Scopus ID: 2-s2.0-84949033755OAI: oai:DiVA.org:kth-180222DiVA: diva2:895607
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QC 20160119

Available from: 2016-01-19 Created: 2016-01-08 Last updated: 2016-01-20Bibliographically approved

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