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Topology from triviality
KTH, School of Engineering Sciences (SCI), Physics. Institut de Physique Théorique, Université Paris Saclay, CEA CNRS, Orme des Merisiers, 91190 Gif-sur-Yvette Cedex, France; Laboratoire de Physique des Solides, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91405 Orsay Cedex, France; Moscow Institute of Physics and Technology, Dolgoprudny 141700, Moscow region, Russia.
2018 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 97, no 10, article id 104512Article in journal (Refereed) Published
Abstract [en]

We show that bringing into proximity two topologically trivial systems can give rise to a topological phase. More specifically, we study a 1D metallic nanowire proximitized by a 2D superconducting substrate with a mixed s-wave and p-wave pairing, and we demonstrate both analytically and numerically that the phase diagram of such a setup can be richer than reported before. Thus apart from the two "expected" well-known phases (i.e., where the substrate and the wire are both simultaneously trivial or topological), we show that there exist two peculiar phases in which the nanowire can be in a topological regime while the substrate is trivial and vice versa. 

Place, publisher, year, edition, pages
American Physical Society , 2018. Vol. 97, no 10, article id 104512
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-227382DOI: 10.1103/PhysRevB.97.104512ISI: 000428238600009Scopus ID: 2-s2.0-85044446126OAI: oai:DiVA.org:kth-227382DiVA, id: diva2:1211157
Note

Export Date: 9 May 2018; Article; Funding details: ANR, Agence Nationale de la Recherche; Funding details: QUANTMATT 679722; Funding text: We would like to acknowledge interesting discussions with Teemu Ojanen, Andrej Mesaros, and Jens Bardarson. This work was partially supported by the French Agence Nationale de la Recherche through the contract ANR Mistral and the ERC Starting Independent Researcher Grant QUANTMATT 679722. APPENDIX A: QC 20180530

Available from: 2018-05-30 Created: 2018-05-30 Last updated: 2018-05-30Bibliographically approved

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