Resonant tunneling through superconducting double barrier structures in graphene

Abstract

We study resonant tunneling through a superconducting double barrier structure in graphene as a function of the system parameters. At each barrier, due to the proximity effect, an incident electron can either reflect as an electron or a hole (specular as well as retro Andreev reflection in graphene). Similarly, transport across the barriers can occur via electrons as well as via the crossed (specular and/or retro) Andreev channel, where a hole is transmitted nonlocally to the other lead. In this geometry, in the subgap regime, we find resonant suppression of Andreev reflection at certain energies, due to the formation of Andreev bound levels between the two superconducting barriers, where the transmission probability T for electrons incident on the double barrier structure becomes unity. The evolution of the transport through the superconducting double barrier geometry as a function of the incident energy for various angles of incidence shows the damping of the resonance as normal reflection between the barriers increases.

This is the published version

References in corpus (18)

• Electric Field Effect in Atomically Thin Carbon Films
• The electronic properties of graphene
• Chiral tunneling and the Klein paradox in graphene
• Electronic transport in two dimensional graphene
• Andreev reflection and Klein tunneling in graphene
• Bipolar supercurrent in graphene
• Quantum interference and Klein tunneling in graphene heterojunctions
• Selective transmission of Dirac electrons and ballistic magnetoresistance of \textit{n-p} junctions in graphene
• Specular Andreev reflection in graphene
• Josephson effect in ballistic graphene
• Tunneling conductance of graphene NIS junctions
• Crossed Andreev reflection in a graphene bipolar transistor
• Contact resistance and shot noise in graphene transistors
• Tunneling conductance in $s$- and d-wave superconductor-graphene junctions: Extended Blonder-Tinkham-Klapwijk formalism
• Dirac-fermions and conductance-oscillations in (s,d)-wave superconductor/normal graphene junctions
• Josephson effect in graphene SBS junctions
• Detecting entangled states in graphene via crossed Andreev reflection
• Pure spin current in graphene NS structures

Cited by in corpus (6)

• Chiral nodes and oscillations in the Josephson current in Weyl semimetals
• Strain Controlled Spin and Charge Pumping in Graphene Devices via Spin-orbit Coupled Barriers
• Quantum charge pumping through resonant crossed Andreev reflection in superconducting hybrid junction of Silicene
• Quantum charge pumping through a superconducting double barrier structure in graphene
• Aspects of the disordered harmonic chain
• Thermoelectric response of Josephson junction: from ballistic to disordered