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Resonant tunnelling between the chiral Landau states of twisted graphene lattices

Greenaway, M.T.; Vdovin, Evgeny E.; Mishchenko, A.; Makarovsky, Oleg; Patanè, Amalia; Wallbank, J.R.; Cao, Y.; Kretinin, A.V.; Zhu, M.J.; Morozov, S.V.; Fal’ko, V.I.; Novoselov, K.S.; Geim, A.K.; Fromhold, T.M.; Eaves, Laurence

Authors

M.T. Greenaway

Evgeny E. Vdovin

A. Mishchenko

J.R. Wallbank

Y. Cao

A.V. Kretinin

M.J. Zhu

S.V. Morozov

V.I. Fal’ko

K.S. Novoselov

A.K. Geim



Abstract

A class of multilayered functional materials has recently emerged in which the component atomic layers are held together by weak van der Waals forces that preserve the structural integrity and physical properties of each layer. An exemplar of such a structure is a transistor device in which relativistic Dirac Fermions can resonantly tunnel through a boron nitride barrier, a few atomic layers thick, sandwiched between two graphene electrodes. An applied magnetic field quantises graphene's gapless conduction and valence band states into discrete Landau levels, allowing us to resolve individual inter-Landau level transitions and thereby demonstrate that the energy, momentum and chiral properties of the electrons are conserved in the tunnelling process. We also demonstrate that the change in the semiclassical cyclotron trajectories, following an inter-layer tunnelling event, is analogous to the case of intra-layer Klein tunnelling.

Journal Article Type Article
Publication Date Oct 19, 2015
Journal Nature Physics
Print ISSN 1745-2473
Electronic ISSN 1745-2481
Publisher Nature Publishing Group
Peer Reviewed Peer Reviewed
Volume 11
Issue 12
Pages 1057-1062
APA6 Citation Greenaway, M., Vdovin, E. E., Mishchenko, A., Makarovsky, O., Patanè, A., Wallbank, J., …Eaves, L. (2015). Resonant tunnelling between the chiral Landau states of twisted graphene lattices. Nature Physics, 11(12), 1057-1062. https://doi.org/10.1038/nphys3507
DOI https://doi.org/10.1038/nphys3507
Publisher URL http://www.nature.com/nphys/journal/v11/n12/full/nphys3507.html
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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