Snake trajectories in ultraclean graphene p-n junctions

Nature Communications
Peter RickhausChristian Schönenberger

Abstract

Snake states are trajectories of charge carriers curving back and forth along an interface. There are two types of snake states, formed by either inverting the magnetic field direction or the charge carrier type at an interface. The former has been demonstrated in GaAs-AlGaAs heterostructures, whereas the latter has become conceivable only with the advance of ballistic graphene where a gap-less p-n interface governed by Klein tunnelling can be formed. Such snake states were hidden in previous experiments due to limited sample quality. Here we report on magneto-conductance oscillations due to snake states in a ballistic suspended graphene p-n junction, which occur already at a very small magnetic field of 20 mT. The visibility of 30% is enabled by Klein collimation. Our finding is firmly supported by quantum transport simulations. We demonstrate the high tunability of the device and operate it in different magnetic field regimes.

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Citations

Nov 18, 2015·Journal of Chemical Theory and Computation·Michael WalzFerdinand Evers
Aug 19, 2015·Nano Letters·Peter RickhausChristian Schönenberger
Oct 7, 2016·Nano Letters·Santiago J Cartamil-BuenoSamer Houri
Dec 15, 2016·Nano Letters·Clevin HandschinChristian Schönenberger
Apr 11, 2017·Nano Letters·Ching-Hao Chang, Carmine Ortix
Jun 10, 2017·Nature Communications·Peter BøggildMads Brandbyge
Mar 13, 2018·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Shu-Guang Cheng
Jun 29, 2018·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Vahid MosallanejadGuoping Guo
Mar 8, 2019·Nanoscale·Abhishek BanerjeeP S Anil Kumar
May 3, 2018·Beilstein Journal of Nanotechnology·Sigurdur I ErlingssonAndrei Manolescu
Oct 7, 2016·Science·Shaowen ChenCory R Dean
Dec 7, 2019·Physical Review Letters·Austin ChengJean-Damien Pillet
Jan 22, 2020·Nanotechnology·Janice Ruth BayoganMinkyung Jung
Oct 13, 2018·Physical Review Letters·E WalterF Hassler
Feb 25, 2017·Physical Review Letters·Ming-Hao LiuKlaus Richter
Dec 5, 2020·Physical Review Letters·Rainer KraftRomain Danneau
Jul 14, 2021·Nature Communications·N MoreauB Hackens
Aug 15, 2017·Nano Letters·Clevin HandschinChristian Schönenberger
Jul 24, 2018·Nano Letters·Jairo VelascoMichael F Crommie
Oct 20, 2018·Nano Letters·Peter RickhausKlaus Ensslin
Jan 19, 2019·Nano Letters·Louis VeyratBenjamin Sacépé

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