Print Email Facebook Twitter Weyl point immersed in a continuous spectrum Title Weyl point immersed in a continuous spectrum: An example from superconducting nanostructures Author Chen, Y. (Kavli institute of nanoscience Delft) Nazarov, Y.V. (TU Delft QN/Nazarov Group; Kavli institute of nanoscience Delft) Date 2021 Abstract A Weyl point in a superconducting nanostructure is a generic minimum model of a topological singularity at low energies. We connect the nanostructure to normal leads thereby immersing the topological singularity in the continuous spectrum of the electron states in the leads. This sets another simple and generic model useful to comprehend the modification of low-energy singularity in the presence of a continuous spectrum. The tunnel coupling to the leads gives rise to new low-energy scale Γ at which all topological features are smoothed. We investigate superconducting and normal currents in the nanostructure at this scale. We show how the tunnel currents can be used for detection of the Weyl point. Importantly, we find that the topological charge is not concentrated in a point but rather is spread over the parameter space in the vicinity of the point. We introduce and compute the resulting topological charge density. We also reveal that the pumping to the normal leads helps to detect and investigate the topological effects in the vicinity of the point. To reference this document use: http://resolver.tudelft.nl/uuid:b38257cd-f7ba-4104-94a4-da39c44468d3 DOI https://doi.org/10.1103/PhysRevB.104.104506 ISSN 2469-9950 Source Physical Review B, 104 (10) Part of collection Institutional Repository Document type journal article Rights © 2021 Y. Chen, Y.V. Nazarov Files PDF PhysRevB.104.104506.pdf 843.16 KB Close viewer /islandora/object/uuid:b38257cd-f7ba-4104-94a4-da39c44468d3/datastream/OBJ/view