Quantum charge pumping through a superconducting double barrier structure in graphene

Abstract

We consider the phenomenon of quantum charge pumping of electrons across a superconducting double barrier structure in graphene in the adiabatic limit. In this geometry, quantum charge pumping can be achieved by modulating the amplitudes (Delta_1 and Delta_2) of the gaps associated with the two superconducting strips. We show that the superconducting gaps give rise to a transmission resonance in the Delta_1-Delta_2 plane, resulting in a large value of pumped charge, when the pumping contour encloses the resonance. This is in sharp contrast to the case of charge pumping in a normal double barrier structure in graphene, where the pumped charge is very small, due to the phenomenon of Klein tunneling. We analyse the behaviour of the pumped charge through the superconducting double barrier geometry as a function of the pumping strength and the phase difference between the two pumping parameters, for various angles of the incident electron.

This is the published version

References in corpus (15)

• Electric Field Effect in Atomically Thin Carbon Films
• The electronic properties of graphene
• Chiral tunneling and the Klein paradox in graphene
• Bipolar supercurrent in graphene
• Specular Andreev reflection in graphene
• Adiabatic pumping through interacting quantum dots
• Charge pumping in carbon nanotube quantum dots
• Accurate high speed single-electron quantum dot preparation
• Pumping through a quantum dot in the proximity of a superconductor
• Adiabatic pumping in a Superconductor-Normal-Superconductor weak link
• Charge transport in a Tomonaga-Luttinger liquid: effects of pumping and bias
• Resonant tunneling through superconducting double barrier structures in graphene
• Adiabatic quantum pumping at the Josephson frequency
• Adiabatic charge pumping through a dot at the junction of N quantum wires
• Quantized charge pumping in superconducting double barrier structure : Non-trivial correlations due to proximity effect

Cited by in corpus (7)

• Adiabatic quantum pumping in graphene NIS junctions
• Quantum charge pumping through resonant crossed Andreev reflection in superconducting hybrid junction of Silicene
• How to detect a genuine quantum pump effect in graphene?
• Adiabatic quantum pumping through surface states in 3D topological insulators
• Pumped shot noise in adiabatically modulated graphene-based double-barrier structures
• Anharmonic Effect of Adiabatic Quantum Pumping
• Pumping current of a Luttinger liquid with finite length