Print Email Facebook Twitter Gate-tunable pairing channels in superconducting non-centrosymmetric oxides nanowires Title Gate-tunable pairing channels in superconducting non-centrosymmetric oxides nanowires Author Singh, Gyanendra (Chalmers University of Technology) Guarcello, Claudio (University of Salerno; Istituto Nazionale di Fisica Nucleare of Napoli) Lesne, E.L. (TU Delft QN/Steele Lab; Kavli institute of nanoscience Delft) Winkler, Dag (Chalmers University of Technology) Claeson, Tord (Chalmers University of Technology) Bauch, Thilo (Chalmers University of Technology) Lombardi, Floriana (Chalmers University of Technology) Caviglia, A. (TU Delft QN/Caviglia Lab; Kavli institute of nanoscience Delft) Citro, Roberta (University of Salerno; Istituto Nazionale di Fisica Nucleare of Napoli) Date 2022 Abstract Two-dimensional SrTiO3-based interfaces stand out among non-centrosymmetric superconductors due to their intricate interplay of gate-tunable Rashba spin-orbit coupling and multi-orbital electronic occupations, whose combination theoretically prefigures various forms of non-standard superconductivity. By employing superconducting transport measurements in nano-devices we present strong experimental indications of unconventional superconductivity in the LaAlO3/SrTiO3 interface. The central observations are the substantial anomalous enhancement of the critical current by small magnetic fields applied perpendicularly to the plane of electron motion, and the asymmetric response with respect to the magnetic field direction. These features cannot be accommodated within a scenario of canonical spin-singlet superconductivity. We demonstrate that the experimental observations can be described by a theoretical model based on the coexistence of Josephson channels with intrinsic phase shifts. Our results exclude a time-reversal symmetry breaking scenario and suggest the presence of anomalous pairing components that are compatible with inversion symmetry breaking and multi-orbital physics. To reference this document use: http://resolver.tudelft.nl/uuid:d3a7600d-b1f9-4010-8ded-c05772a8cd9a DOI https://doi.org/10.1038/s41535-021-00406-6 Source npj Quantum Materials, 7 (1) Part of collection Institutional Repository Document type journal article Rights © 2022 Gyanendra Singh, Claudio Guarcello, E.L. Lesne, Dag Winkler, Tord Claeson, Thilo Bauch, Floriana Lombardi, A. Caviglia, Roberta Citro, More Authors Files PDF s41535_021_00406_6.pdf 3.94 MB Close viewer /islandora/object/uuid:d3a7600d-b1f9-4010-8ded-c05772a8cd9a/datastream/OBJ/view