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Title: Tunnel spectroscopy of localised electronic states in hexagonal boron nitride
Authors: Greenaway, M.T.
Vdovin, E.E.
Ghazaryan, D.
Misra, A.
Mishchenko, A.
Cao, Y.
Wang, Z.
Wallbank, J.R.
Holwill, M.
Khanin, Yu. N.
Morozov, S.V.
Watanabe, K.
Taniguchi, T.
Makarovsky, O.
Fromhold, T.M.
Patane, A.
Geim, A.K.
Fal'ko, V.I.
Novoselov, K.S.
Eaves, Laurence
Issue Date: 2018
Publisher: © the Authors. Published by Springer Nature
Citation: GREENAWAY, M.T. ... et al., 2018. Tunnel spectroscopy of localised electronic states in hexagonal boron nitride. Communications Physics, 1: 94.
Abstract: Hexagonal boron nitride is a large band gap layered crystal, frequently incorporated in van der Waals heterostructures as an insulating or tunnel barrier. Localised states with energies within its band gap can emit visible light, relevant to applications in nanophotonics and quantum information processing. However, they also give rise to conducting channels, which can induce electrical breakdown when a large voltage is applied. Here we use gated tunnel transistors to study resonant electron tunnelling through the localised states in few atomiclayer boron nitride barriers sandwiched between two monolayer graphene electrodes. The measurements are used to determine the energy, linewidth, tunnelling transmission probability, and depth within the barrier of more than 50 distinct localised states. A three-step process of electron percolation through two spatially separated localised states is also investigated.
Description: This is an Open Access Article. It is published by Springer under the Creative Commons Attribution 4.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/
Sponsor: EU Graphene Flagship Program, European Research Council Synergy Grant Hetero2D, the Royal Society, Engineering and Physical Research Council (UK, grants EP/N007131/1 and EP/N010345/1), US Army Research Office (W911NF-16-1-0279). E.E.V. acknowledge support from Russian Science Foundation (17-12-01393), S.V.M. from NUST “MISiS” (K2-2017-009) and Yu.N.K. from RAS Presidium Program N4 (task 007-00220- 18-00).
Version: Published
DOI: 10.1038/s42005-018-0097-1
URI: https://dspace.lboro.ac.uk/2134/36465
Publisher Link: https://doi.org/10.1038/s42005-018-0097-1
Appears in Collections:Published Articles (Physics)

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