Year: 2023
Type: article
Abstract: We report on a ballistic and fully tunable Josephson-junction system consisting of two parallel ribbons of graphene in contact with superconducting molybdenum-rhenium. By electrostatic gating of the two individual graphene ribbons, we gain control over the real-space distribution of the superconducting current density, which can be continuously tuned between the two ribbons. We extract the respective gate-dependent spatial distributions of the real-space current density by employing Fourier and Hilbert transformations of the magnetic-field-induced modulation of the critical current. This approach is fast and does not rely on a symmetric current profile. It is therefore a universally applicable tool, potentially useful for carefully adjusting Josephson junctions.
Source: Physical Review Applied
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: G2115222242, G2757308639, G3265991562, G3356704239, G434337789, G4453442172, G4672599647, 2D Materials for Quantum Technology, Graphene Flagship Core Project 3, G581057490, G6664495284, Quantentransport in Nanoröhren: EinzelelektronOptomechanik und neuartige Materialien, EXC 2004: Materie und Licht für Quanteninformation (ML4Q), Synthesis of high quality single crystals for sience of Boron Nitride, G898758523
OpenAlex ID: W4388899622