Regensburg 2022 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 72: 2D Materials 3: hBN and Electronic Structure
O 72.5: Vortrag
Donnerstag, 8. September 2022, 16:00–16:15, S052
Tuning lower dimensional superconductivity with hybridization at a superconducting-semiconducting interface — •Anand Kamlapure1, Manuel Simonato1, Emil Sierda1, Manuel Steinbrecher1, Umut Kamber1, Elze J. Knol1, Peter Krogstrup2, Mikhail I. Katsnelson1, Malte Rösner1, and Alexander A. Khajetoorians1 — 1Institute for Molecules and Materials, Radboud University, 6525 AJ Nijmegen, the Netherlands — 2Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark
Study of influence of interface electronic structure on the superconductivity (SC) in lower dimensions is important to tune SC in view of its applications to gated superconducting electronics, and superconducting layered heterostructures. Here, using ultra-low temperature scanning tunneling microscopy and spectroscopy, we demonstrate the formation of hybrid electronic structure at the interface between a lead film and black phosphorus. We show that interfacial hybridization weakly modifies the confinement potential and leads to a renormalization of the superconducting gap and a strong modification of the observed vortex structure. Using ab initio methods combined with analytical modeling, we link the renormalized gap to a weighting of the superconducting order parameter in reciprocal space. These results illustrate that interfacial hybridization can be used to tune SC in quantum technologies based on lower dimensional superconducting electronics. Reference: arXiv:2109.08498 (2021).