Abundance of Weyl points in semiclassical multiterminal superconducting nanostructures

Journal article (2023)

Authors

H.S. Barakov QN/Nazarov Group - AS , Kavli institute of nanoscience Delft
Y.V. Nazarov Kavli institute of nanoscience Delft, QN/Nazarov Group - AS
Research Group
QN/Nazarov Group (AS) (TU Delft)
Copyright: © 2023 H.S. Barakov, Y.V. Nazarov
DOI: https://doi.org/10.1103/PhysRevB.107.014507
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Published Date

2023

Language

English

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Faculty

Applied Sciences

Department

QN/Quantum Nanoscience

Research Group

QN/Nazarov Group

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.

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