Controllable Andreev retroreflection and specular Andreev reflection in a four-terminal graphene-superconductor hybrid system

Abstract

We report the investigation of electron transport through a four-terminal graphene-superconductor hybrid system. Due to the quantum interference of the reflected holes from two graphene-superconductor interfaces with phase difference $\theta$, it is found that the specular Andreev reflection vanishes at $\theta =0$ while the Andreev retroreflection disappears at $\theta =\pi$. This means that the retroreflection and specular reflection can be easily controlled and separated in this device. In addition, due to the diffraction effect in the narrow graphene nanoribbon, the reflected hole can exit from both graphene terminals. As the width of nanoribbon increases, the diffraction effect gradually disappears and the reflected hole eventually exits from a particular graphene terminal depending on the type of Andreev reflection.

4 pages, 5 figures

References in corpus (13)

• Electric Field Effect in Atomically Thin Carbon Films
• The electronic properties of graphene
• Energy Gaps in Graphene Nanoribbons
• Andreev reflection and Klein tunneling in graphene
• Bipolar supercurrent in graphene
• Specular Andreev reflection in graphene
• Phase Coherent Transport of Charges in Graphene Quantum Billiard
• Tunneling conductance of graphene NIS junctions
• Disorder-induced enhancement of transport through graphene p-n junctions
• Crossed Andreev reflection in a graphene bipolar transistor
• Quantum transport through a graphene nanoribbon-superconductor junction
• A supercurrent switch in graphene $\pi$-junctions
• Andreev reflection in graphene nanoribbons

Cited by in corpus (38)

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• The Aharonov-Bohm effect in graphene rings
• Crossed Andreev effects in two-dimensional quantum Hall systems
• Double Andreev Reflections in Type-II Weyl Semimetal-Superconductor Junctions
• Non-Abelian Braiding of Chiral Majorana Fermions by Quantum Dots
• Electrical control of crossed Andreev reflection and spin-valley switch in antiferromagnet/superconductor junctions
• The focusing of electron flow in a bipolar Graphene ribbon with different chiralities
• How to Distinguish between Specular and Retroconfigurations for Andreev Reflection in Graphene Rings
• Quantum Andreev effect in 2D HgTe/CdTe quantum well-superconductor systems
• Magnetoanisotropic spin-triplet Andreev reflection in ferromagnet-Ising superconductor junctions
• Spin-filtered and Spatially Distinguishable Crossed Andreev Reflection in a Silicene-Superconductor Junction
• Quantum interference in topological insulator Josephson junctions
• Specular Andreev reflection in thin films of topological insulators
• The parity of specular Andreev reflection under mirror operation in zigzag graphene ribbon
• The influence of anti-chiral edge states on Andreev reflection in graphene-superconductor junction
• Chiral Majorana fermion modes regulated by a scanning tunneling microscope tip
• Spin-polarized Specular Andreev Reflections in Altermagnets
• Electrically tunable chiral Majorana edge modes in quantum anomalous Hall insulator-topological superconductor systems
• Double Andreev reflections and double normal reflections in nodal-line semimetal-superconductor junctions
• High-Efficiency Cooper-Pair Splitter in Quantum Anomalous Hall Insulator Proximity-Coupled with Superconductor
• Perfect crossed Andreev reflection in the proximitized graphene/superconductor/proximitized graphene junctions
• Charge and spin transport through normal lead coupled to $s$-wave superconductor and a Majorana zero mode
• Magnetic field oscillations of the critical current in long ballistic graphene Josephson junctions
• Magnetic Flux Control of Chiral Majorana Edge Modes in Topological Superconductor
• Spin-flip reflection at the normal metal-spin superconductor interface
• Specular Andreev reflection and its detection
• Spin-valley dependent double Andreev reflections in the proximitized graphene/superconductor junction
• Four-terminal graphene-superconductor thermal switch controlled by the superconducting phase difference
• Double refraction and spin splitter in a normal-hexagonal semiconductor junction
• Andreev reflection in a Y-shaped graphene-superconductor device
• Resonant tunneling through double-barrier structures on graphene
• Supercurrent reversal in Josephson junctions based on bilayer graphene flakes
• High-performance Andreev interferometer-based electronic coolers
• Realization of the Non-endpoint Majorana Bound States in an Extended Kitaev Chain
• Field-Programmable Topological Array: Framework and Case-Studies
• Majorana modes in helical altermagnet without net magnetism and spin-orbit coupling
• Specular-Andreev reflection and Andreev interference in an Ising superconductor junction
• Transport through Nodal Surface Semimetal-Superconductor junction in absence/presence of light irradiation