Induced unconventional superconductivity on the surface states of Bi2Te3 topological insulator

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en Charpentier, Sophie Galletti, Luca Kunakova, Gunta Arpaia, Riccardo Song, Yuxin Baghdadi, Reza Wang, Shu Min Kalaboukhov, Alexei Olsson, Eva Tafuri, Francesco Golubev, Dmitry Linder, Jacob Bauch, Thilo Lombardi, Floriana 2018-02-09T09:54:21Z 2018-02-09T09:54:21Z 2017-12-01
dc.identifier.citation Charpentier , 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 . DOI: 10.1038/s41467-017-02069-z en
dc.identifier.issn 2041-1723
dc.identifier.other PURE UUID: 22ca17f2-1fc4-4a18-8ae6-f4ad319b5291
dc.identifier.other PURE ITEMURL:
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dc.description.abstract Topological 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.format.extent 1-8
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries Nature Communications en
dc.relation.ispartofseries Volume 8, issue 1 en
dc.rights openAccess en
dc.subject.other Chemistry(all) en
dc.subject.other Biochemistry, Genetics and Molecular Biology(all) en
dc.subject.other Physics and Astronomy(all) en
dc.subject.other 114 Physical sciences en
dc.title Induced unconventional superconductivity on the surface states of Bi2Te3 topological insulator en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Chalmers University of Technology
dc.contributor.department University of Naples Federico II
dc.contributor.department Department of Applied Physics
dc.contributor.department Norwegian University of Science and Technology
dc.subject.keyword Chemistry(all)
dc.subject.keyword Biochemistry, Genetics and Molecular Biology(all)
dc.subject.keyword Physics and Astronomy(all)
dc.subject.keyword 114 Physical sciences
dc.identifier.urn URN:NBN:fi:aalto-201802091252
dc.identifier.doi 10.1038/s41467-017-02069-z
dc.type.version publishedVersion

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