# Colloquium: Andreev reflection and Klein tunneling in graphene

@article{Beenakker2008ColloquiumAR,
title={Colloquium: Andreev reflection and Klein tunneling in graphene},
author={C. W. J. Beenakker},
journal={Reviews of Modern Physics},
year={2008},
volume={80},
pages={1337-1354}
}
• C. Beenakker
• Published 20 October 2007
• Physics
• Reviews of Modern Physics
A colloquium-style introduction to two electronic processes in a carbon monolayer (graphene) is presented, each having an analog in relativistic quantum mechanics. Both processes couple electronlike and holelike states, through the action of either a superconducting pair potential or an electrostatic potential. The first process, Andreev reflection, is the electron-to-hole conversion at the interface with a superconductor. The second process, Klein tunneling, is the tunneling through a $p\text… 817 Citations Specular interband Andreev reflections at van der Waals interfaces between graphene and NbSe2 • Physics • 2016 Andreev reflection occurs at the interface of a metal and a superconductor when an incident electron in the metal gets ‘reflected’ as a hole travelling on the same path. Replace the metal with Influence of antichiral edge states on Andreev reflection in graphene-superconductor junction • Physics Physical Review B • 2020 Using the tight binding model and the non-equilibrium Green function method, we study Andreev reflection in graphene-superconductor junction, where graphene has two nonequal Dirac Cones split in Perfect Andreev reflection due to the Klein paradox in a topological superconducting state • Physics Nature • 2019 The observation of perfect Andreev reflection in point-contact spectroscopy is reported—a clear signature of Klein tunnelling and a manifestation of the underlying ‘relativistic’ physics of a proximity-induced superconducting state in a topological Kondo insulator. Observation of angle-dependent transmission of Dirac electrons in graphene hetero junctions • Physics • 2013 The relativistic nature of charge carriers in graphene is expected to lead to an angle- dependent transmission through a potential barrier, where Klein tunneling involves annihilation of an electron Dirac point formation revealed by Andreev tunneling in superlattice-graphene/superconductor junctions • Physics Physical Review B • 2019 A graphene superlattice is formed by a one-dimensional periodic potential and is characterized by the emergence of new Dirac points in the electronic structure. The group velocity of graphene's Spin-dependent Klein tunneling in graphene: Role of Rashba spin-orbit coupling • Physics • 2012 Within an effective Dirac theory the low-energy dispersions of monolayer graphene in the presence of Rashba spin-orbit coupling and spin-degenerate bilayer graphene are described by formally Giant Valley-Isospin Conductance Oscillations in Ballistic Graphene. • Physics Nano letters • 2017 P-n junctions in encapsulated graphene with a movable p-n interface are investigated with large quantum conductance oscillations on the order of e2/h which solely depend on the p- n junction position providing the first signature of isospin-defined conductance. Conductance oscillations induced by ballistic snake states in a graphene heterojunction. • Physics Nature communications • 2015 The observation of conductance oscillations due to ballistic snake states along a p-n interface in high-quality graphene encapsulated by hexagonal boron nitride are reported, which are exceptionally robust as they can propagate over 12 μm, limited only by the size of the authors' sample, and survive up to at least 120 K. Imaging Andreev Reflection in Graphene. • Physics Nano letters • 2020 A liquid-helium cooled scanning gate microscope is used to image Andreev reflection in graphene in the magnetic focusing regime, where carriers move along cyclotron orbits between contacts. Interplay of the Aharonov-Bohm effect and Klein tunneling in graphene • Physics • 2010 We numerically investigate the effect of Klein tunneling on the Aharonov-Bohm oscillations in graphene rings using a tight-binding model with nearest-neighbor couplings. 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