Weyl points in the multi-terminal Hybrid Superconductor-Semiconductor Nanowire devices

2020/10/22 by Repin, E. V., Nazarov, Y. V.
#FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall)

paper · doi:10.48550/arxiv.2010.11494

Abstract

The technology of superconductor-semiconductor nanowire devices has matured in the last years in the quest for topological quantum computing. This makes it feasible to make more complex and sophisticated devices. We investigate multi-terminal superconductor-semiconductor wires to access feasibility of another topological phenomenon: Weyl singularities in their spectrum. We have found an abundance of Weyl singularities for devices with intermediate size of the electrodes. We describe their properties and the ways the singularities emerge and disappear upon variation of the setup parameters.

Related

• Abundance of Weyl points in semiclassical multi-terminal superconducting nanostructures
• Perspective on Majorana bound-states in hybrid superconductor-semiconductor nanowires
• Quest for topological superconductivity at superconductor-semiconductor interfaces
• Classification of Weyl point trajectories in multi-terminal Josephson junctions
• Tuning of Weyl point emergence in multi-terminal Josephson junctions using quantum point contacts