Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Resonant tunnelling between the chiral Landau states of twisted graphene lattices
AU - Greenaway, M. T.
AU - Vdovin, E. E
AU - Mishchenko, Artem
AU - Makarovsky, O
AU - Patane, A.
AU - Wallbank, John
AU - Cao, Y.
AU - Kretinin, A. V.
AU - Zhu, M. J.
AU - Morozov, S. V.
AU - Falko, Vladimir
AU - Novoselov, K. S.
AU - Geim, A. K.
AU - Fromhold, T. M.
AU - Eaves, L
PY - 2015/12
Y1 - 2015/12
N2 - 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 quantizes 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.
AB - 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 quantizes 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.
U2 - 10.1038/nphys3507
DO - 10.1038/nphys3507
M3 - Journal article
VL - 11
SP - 1057
EP - 1062
JO - Nature Physics
JF - Nature Physics
SN - 1745-2473
ER -