Quantum Hall effect in graphene with superconducting electrodes

Abstract

We have realized an integer quantum Hall system with superconducting contacts by connecting graphene to niobium electrodes. Below their upper critical field of 4 tesla, an integer quantum Hall effect coexists with superconductivity in the leads, but with a plateau conductance that is larger than in the normal state. We ascribe this enhanced quantum Hall plateau conductance to Andreev processes at the graphene-superconductor interface leading to the formation of so-called Andreev edge-states. The enhancement depends strongly on the filling-factor, and is less pronounced on the first plateau, due to the special nature of the zero energy Landau level in monolayer graphene.

10 pages, 4 figures

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Cited by in corpus (77)

• Exotic non-Abelian anyons from conventional fractional quantum Hall states
• Ballistic Josephson junctions in edge-contacted graphene
• The role of contact resistance in graphene field-effect devices
• Supercurrent in the quantum Hall regime
• Inducing Superconducting Correlation in Quantum Hall Edge States
• Specular Interband Andreev Reflections in Graphene
• Fermion-parity anomaly of the critical supercurrent in the quantum spin-Hall effect
• Gigahertz quantized charge pumping in graphene quantum dots
• Snake Trajectories in Ultraclean Graphene p-n Junctions
• Superconducting proximity effect through graphene from zero field to the Quantum Hall regime
• Graphene field effect transistors with Niobium contacts and asymmetric transfer characteristics
• Proximity coupling in superconductor-graphene heterostructures
• Interference of chiral Andreev edge states
• Andreev reflection in the fractional quantum Hall state
• Annihilation of colliding Bogoliubov quasiparticles reveals their Majorana nature
• Tunable Klein-like tunneling of high-temperature superconducting pairs into graphene
• Crossed Andreev effects in two-dimensional quantum Hall systems
• Induced superconducting pairing in integer quantum Hall edge states
• Inter-Landau-level Andreev Reflection at the Dirac Point in a Graphene Quantum Hall State Coupled to a NbSe2 Superconductor
• Evidence for chiral supercurrent in quantum Hall Josephson junctions
• Perfect crossed Andreev reflection in Dirac hybrid junctions in the quantum Hall regime
• Unconventional Features in the Quantum Hall Regime of Disordered Graphene: Percolating Impurity States and Hall Conductance Quantization
• Crossed Andreev reflection in spin-polarized chiral edge states due to the Meissner effect
• Vortex-enabled Andreev processes in quantum Hall-superconductor hybrids
• The influence of anti-chiral edge states on Andreev reflection in graphene-superconductor junction
• Tailoring supercurrent confinement in graphene bilayer weak links
• Loss and decoherence at the quantum Hall - superconductor interface
• Non-local interference and Hong-Ou-Mandel collisions of single Bogoliubov quasiparticles
• Electronic quantum optics beyond the integer quantum Hall effect
• Subgap states in two dimensional spectroscopy of unconventional superconductors using graphene
• Majorana fermions from Landau quantization in a superconductor--topological-insulator hybrid structure
• Topological superconductivity in Quantum Hall-superconductor hybrid systems
• Two-terminal transport along a proximity induced superconducting quantum Hall edge
• Equal-Spin Andreev Reflection in Junctions of Spin-Resolved Quantum Hall Bulk State and Spin-Singlet Superconductor
• Quantum transport in chemically functionalized graphene at high magnetic field: Defect-Induced Critical States and Breakdown of Electron-Hole Symmetry
• Vortex Lattice Structure and Topological Superconductivity in the Quantum Hall Regime
• Magnetic field oscillations of the critical current in long ballistic graphene Josephson junctions
• Quantized conductance with non-zero shot noise as a signature of Andreev edge state
• Spin-dependent thermoelectric effects in graphene based superconductor junctions
• Chiral Majorana Interference as a Source of Quantum Entanglement
• Bosonization for fermions and parafermions
• Enhanced shot noise at bilayer graphene -- superconductor junction
• Andreev reflection at the interface with an oxide in the quantum Hall regime
• Topological superconductivity in Landau levels
• Niobium-based superconducting nano-devices fabrication using all-metal suspended masks
• Absence of Aharonov-Bohm effect of chiral Majorana fermion edge states
• Current correlations of Cooper-pair tunneling into a quantum Hall system
• Dirac point formation revealed by Andreev tunneling in superlattice-graphene/superconductor junctions
• Quantum Hall effect in epitaxial graphene with permanent magnets
• Quantum Hall Bogoliubov Interferometer
• Chiral Quasiparticle Tunneling Between Quantum Hall Edges in Proximity with a Superconductor
• Controllable Andreev Bound States in Bilayer Graphene Josephson Junction from Short to Long Junction Limits
• Andreev reflection in a Y-shaped graphene-superconductor device
• Entanglement of Nambu Spinors and Bell Inequality Test Without Beam Splitters
• Breakdown of the Hebel-Slichter effect in superconducting graphene due to the emergence of Yu-Shiba-Rusinov states at magnetic resonant scatterers
• SU(4) Symmetry Breaking and Induced Superconductivity in Graphene Quantum Hall Edges
• Tuning the supercurrent distribution in parallel ballistic graphene Josephson junctions
• Asymmetric Andreev Reflection Induced Electrical and Thermal Hall-like Effects in Metal/Anisotropic Superconductor Junctions
• Spin transport in a graphene normal-superconductor junction in the quantum Hall regime
• Non-local transport measurements in hybrid quantum Hall - superconducting devices
• Topological Josephson Junctions in the Integer Quantum Hall Regime
• Andreev Reflection in the Quantum Hall Regime at an Al/InAs Junction on a Cleaved Edge
• Andreev magneto-interferometry in topological hybrid junctions
• Magnetic field suppression of Andreev conductance at superconductor-graphene interfaces
• Heat-charge separation in a hybrid superconducting quantum Hall setup
• Demonstration of high-impedance superconducting NbRe Dayem bridges
• Wigner representation of Andreev-reflected charge pulses
• On-Demand and Tunable Andreev-Conversion of Single-Electron Charge Pulses
• Floquet-Nambu theory of electron quantum optics with superconductors
• Disordered Quantum Transport in Quantum Anomalous Hall Insulator-Superconductor Junctions
• Hall Effect for Dirac Electrons in Graphene Exposed to an Abrikosov Flux Lattice
• Neutral edge modes in a superconductor -- topological-insulator hybrid structure in a perpendicular magnetic field
• Anisotropic supercurrent suppression and revivals in a graphene-based Josephson junction under in-plane magnetic fields
• Edge dependence of the Josephson current in the quantum Hall regime
• Coupling of Klein-Andreev Resonant States in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+x}$-graphene-Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+x}$ Devices
• Quantized Transport of $\nu =2/3$ Fractional Quantum Hall Edge with Disordered Superconducting Proximity
• Tunneling density of states in Luttinger Liquid in proximity to a superconductor: Effect of non-local interaction