Fabry-Pérot interference in Josephson junctions

Abstract

Conductance of metallic heterostructures can be controlled by applying a gate voltage to a region in the transport channel. For sufficiently long phase coherent channels, oscillations appear in conductance versus chemical potential plot, which can be explained by Fabry-Pérot interference. In this work, we study DC Josephson effect in a superconductor-normal metal-superconductor junctions. The chemical potential of the normal metal (NM) region can be tuned by an applied gate voltage. We numerically obtain the Andreev bound states formed within the superconducting gap and calculate Josephson current by summing up the currents carried by the occupied Andreev bound states. We find that the Josephson current oscillates as a function of the chemical potential in the NM region, and these oscillations can be explained by Fabry-Pérot interference condition. We find that Josephson current carried by one bound state can be higher than that carried by two or more bound states.

arXiv comment5 pages, 3 captioned figures

References in corpus (11)

• The Role of Interactions in an Electronic Fabry-Perot Interferometer Operating in the Quantum Hall Effect Regime
• Josephson current carried by Andreev levels in superconducting quantum point contacts
• Magnetic field induced Fabry-Pérot resonances in helical edge states
• Enhancement of crossed Andreev reflection in a superconducting ladder connected to normal metal leads
• Enhancement of crossed Andreev reflection in a Kitaev ladder connected to normal metal leads
• Transconductance as a probe of nonlocality of Majorana fermions
• Finite transverse conductance in topological insulators under an applied in-plane magnetic field
• Tunable crossed Andreev reflection in a heterostructure consisting of ferromagnets, normal metal and superconductors
• Finite transverse conductance and anisotropic magnetoconductance under an applied in-plane magnetic field in two-dimensional electron gases with strong spin-orbit coupling
• Transmission across non-Hermitian $\mathcal{P}\mathcal{T}$-symmetric quantum dots and ladders
• Transverse currents in spin transistors

Cited by in corpus (5)

• Crossed Andreev reflection in altermagnets
• Crossed Andreev reflection in collinear $p$-wave magnet/triplet superconductor junctions
• Josephson diode effect in one-dimensional quantum wires connected to superconductors with mixed singlet-triplet pairing
• Josephson diode effect in junctions of superconductors with band asymmetric metals
• Nature of Andreev bound states in Josephson junctions of triple-point semimetals