Induced unconventional superconductivity on the surface states of Bi2Te3 topological insulator

dc.contributorAalto Universityen
dc.contributor.authorCharpentier, Sophieen_US
dc.contributor.authorGalletti, Lucaen_US
dc.contributor.authorKunakova, Guntaen_US
dc.contributor.authorArpaia, Riccardoen_US
dc.contributor.authorSong, Yuxinen_US
dc.contributor.authorBaghdadi, Rezaen_US
dc.contributor.authorWang, Shu Minen_US
dc.contributor.authorKalaboukhov, Alexeien_US
dc.contributor.authorOlsson, Evaen_US
dc.contributor.authorTafuri, Francescoen_US
dc.contributor.authorGolubev, Dmitryen_US
dc.contributor.authorLinder, Jacoben_US
dc.contributor.authorBauch, Thiloen_US
dc.contributor.authorLombardi, Florianaen_US
dc.contributor.departmentDepartment of Applied Physicsen
dc.contributor.groupauthorQuantum Phenomena and Devicesen
dc.contributor.organizationChalmers University of Technologyen_US
dc.contributor.organizationUniversity of Naples Federico IIen_US
dc.contributor.organizationNorwegian University of Science and Technologyen_US
dc.description.abstractTopological superconductivity is central to a variety of novel phenomena involving the interplay between topologically ordered phases and broken-symmetry states. The key ingredient is an unconventional order parameter, with an orbital component containing a chiral p x + ip y wave term. Here we present phase-sensitive measurements, based on the quantum interference in nanoscale Josephson junctions, realized by using Bi2Te3 topological insulator. We demonstrate that the induced superconductivity is unconventional and consistent with a sign-changing order parameter, such as a chiral p x + ip y component. The magnetic field pattern of the junctions shows a dip at zero externally applied magnetic field, which is an incontrovertible signature of the simultaneous existence of 0 and π coupling within the junction, inherent to a non trivial order parameter phase. The nano-textured morphology of the Bi2Te3 flakes, and the dramatic role played by thermal strain are the surprising key factors for the display of an unconventional induced order parameter.en
dc.description.versionPeer revieweden
dc.identifier.citationCharpentier, S, Galletti, L, Kunakova, G, Arpaia, R, Song, Y, Baghdadi, R, Wang, S M, Kalaboukhov, A, Olsson, E, Tafuri, F, Golubev, D, Linder, J, Bauch, T & Lombardi, F 2017, ' Induced unconventional superconductivity on the surface states of Bi 2 Te 3 topological insulator ', Nature Communications, vol. 8, no. 1, 2019, pp. 1-8 .
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dc.relation.ispartofseriesNature Communicationsen
dc.relation.ispartofseriesVolume 8, issue 1en
dc.titleInduced unconventional superconductivity on the surface states of Bi2Te3 topological insulatoren
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi