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Nematic Skyrmions in Odd-Parity Superconductors
KTH, School of Engineering Sciences (SCI), Physics.
KTH, School of Engineering Sciences (SCI), Physics.ORCID iD: 0000-0001-5087-3115
KTH, School of Engineering Sciences (SCI), Physics.
2017 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 119, no 16, article id 167001Article in journal (Refereed) Published
Abstract [en]

We study topological excitations in two-component nematic superconductors, with a particular focus on CuxBi2Se3 as a candidate material. We find that the lowest-energy topological excitations are coreless vortices: a bound state of two spatially separated half-quantum vortices. These objects are nematic Skyrmions, since they are characterized by an additional topological charge. The inter-Skyrmion forces are dipolar in this model, i.e., attractive for certain relative orientations of the Skyrmions, hence forming multi-Skyrmion bound states.

Place, publisher, year, edition, pages
American Physical Society , 2017. Vol. 119, no 16, article id 167001
Keywords [en]
Bismuth compounds, Copper compounds, Quantum theory, Selenium compounds, Topology, Vortex flow, Bound state, Candidate materials, Odd-parity, Quantum vortex, Relative orientation, Topological charges, Topological excitations, Two-component, Superconducting materials
National Category
Theoretical Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-227083DOI: 10.1103/PhysRevLett.119.167001Scopus ID: 2-s2.0-85031929755OAI: oai:DiVA.org:kth-227083DiVA, id: diva2:1206619
Note

QC 20180517

Available from: 2018-05-17 Created: 2018-05-17 Last updated: 2018-05-17Bibliographically approved

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Garaud, JulienBabaev, Egor

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