Abundance of Weyl points in semiclassical multiterminal superconducting nanostructures
Hristo Barakov (TU Delft - QN/Nazarov Group, Kavli institute of nanoscience Delft)
Y.V. Nazarov (Kavli institute of nanoscience Delft, TU Delft - QN/Nazarov Group)
More Info
expand_more
Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.
Abstract
We show that the quasicontinuous gapless spectrum of Andreev bound states in multiterminal semi-classical superconducting nanostructures exhibits a large number of topological singularities. We concentrate on Weyl points in a four-terminal nanostructure and compute their density and correlations in three-dimensional parameter space for a universal random matrix theory model as well as for the concrete nanostructures described by the quantum circuit theory. We mention the opportunities for experimental observation of the effect in a quasicontinuous spectrum.