Skip to Main content Skip to Navigation
Journal articles

Snake trajectories in ultraclean graphene p-n junctions

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 20mT. 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.
Document type :
Journal articles
Complete list of metadata
Contributor : Jérôme Planès Connect in order to contact the contributor
Submitted on : Thursday, March 15, 2018 - 2:57:42 PM
Last modification on : Thursday, January 20, 2022 - 12:30:02 PM

Links full text




Peter Rickhaus, Peter Makk, Ming-Hao Liu, Endre Tovari, Markus Weiss, et al.. Snake trajectories in ultraclean graphene p-n junctions. Nature Communications, Nature Publishing Group, 2015, 6, pp.6470. ⟨10.1038/ncomms7470⟩. ⟨cea-01735133⟩



Record views