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Electrostatic control of the proximity effect in the bulk of semiconductor-superconductor hybrids.
van Loo, Nick; Mazur, Grzegorz P; Dvir, Tom; Wang, Guanzhong; Dekker, Robin C; Wang, Ji-Yin; Lemang, Mathilde; Sfiligoj, Cristina; Bordin, Alberto; van Driel, David; Badawy, Ghada; Gazibegovic, Sasa; Bakkers, Erik P A M; Kouwenhoven, Leo P.
Afiliación
  • van Loo N; QuTech and Kavli Institute of Nanoscience, Delft University of Technology, 2628 CJ, Delft, The Netherlands.
  • Mazur GP; QuTech and Kavli Institute of Nanoscience, Delft University of Technology, 2628 CJ, Delft, The Netherlands. g.p.mazur@tudelft.nl.
  • Dvir T; QuTech and Kavli Institute of Nanoscience, Delft University of Technology, 2628 CJ, Delft, The Netherlands.
  • Wang G; QuTech and Kavli Institute of Nanoscience, Delft University of Technology, 2628 CJ, Delft, The Netherlands.
  • Dekker RC; QuTech and Kavli Institute of Nanoscience, Delft University of Technology, 2628 CJ, Delft, The Netherlands.
  • Wang JY; QuTech and Kavli Institute of Nanoscience, Delft University of Technology, 2628 CJ, Delft, The Netherlands.
  • Lemang M; QuTech and Kavli Institute of Nanoscience, Delft University of Technology, 2628 CJ, Delft, The Netherlands.
  • Sfiligoj C; QuTech and Kavli Institute of Nanoscience, Delft University of Technology, 2628 CJ, Delft, The Netherlands.
  • Bordin A; QuTech and Kavli Institute of Nanoscience, Delft University of Technology, 2628 CJ, Delft, The Netherlands.
  • van Driel D; QuTech and Kavli Institute of Nanoscience, Delft University of Technology, 2628 CJ, Delft, The Netherlands.
  • Badawy G; Department of Applied Physics, Eindhoven University of Technology, 5600 MB, Eindhoven, The Netherlands.
  • Gazibegovic S; Department of Applied Physics, Eindhoven University of Technology, 5600 MB, Eindhoven, The Netherlands.
  • Bakkers EPAM; Department of Applied Physics, Eindhoven University of Technology, 5600 MB, Eindhoven, The Netherlands.
  • Kouwenhoven LP; QuTech and Kavli Institute of Nanoscience, Delft University of Technology, 2628 CJ, Delft, The Netherlands. l.p.kouwenhoven@tudelft.nl.
Nat Commun ; 14(1): 3325, 2023 Jun 07.
Article en En | MEDLINE | ID: mdl-37286544
The proximity effect in semiconductor-superconductor nanowires is expected to generate an induced gap in the semiconductor. The magnitude of this induced gap, together with the semiconductor properties like spin-orbit coupling and g-factor, depends on the coupling between the materials. It is predicted that this coupling can be adjusted through the use of electric fields. We study this phenomenon in InSb/Al/Pt hybrids using nonlocal spectroscopy. We show that these hybrids can be tuned such that the semiconductor and superconductor are strongly coupled. In this case, the induced gap is similar to the superconducting gap in the Al/Pt shell and closes only at high magnetic fields. In contrast, the coupling can be suppressed which leads to a strong reduction of the induced gap and critical magnetic field. At the crossover between the strong-coupling and weak-coupling regimes, we observe the closing and reopening of the induced gap in the bulk of a nanowire. Contrary to expectations, it is not accompanied by the formation of zero-bias peaks in the local conductance spectra. As a result, this cannot be attributed conclusively to the anticipated topological phase transition and we discuss possible alternative explanations.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2023 Tipo del documento: Article País de afiliación: Países Bajos Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2023 Tipo del documento: Article País de afiliación: Países Bajos Pais de publicación: Reino Unido