1803.02120-2.pdf (1.86 MB)
Magnon-assisted tunnelling in van der Waals heterostructures based on CrBr3
journal contribution
posted on 2018-07-02, 13:15 authored by D. Ghazaryan, Mark GreenawayMark Greenaway, Z. Wang, V.H. Guarochico-Moreira, I.J. Vera-Marun, J. Yin, Y. Liao, S.V. Morozov, O. Kristanovski, A.I. Lichenstein, M.I. Katsnelson, F. Withers, A. Mishchenko, Laurence Eaves, A.K. Geim, K.S. Novoselov, A. MisraVan der Waals heterostructures, which are composed of layered two-dimensional materials, offer a platform to investigate a diverse range of physical phenomena and could be of use in a variety of applications. Heterostructures containing two-dimensional ferromagnets, such as chromium triiodide (CrI3), have recently been reported, which could allow two-dimensional spintronic devices to be developed. Here we study tunnelling through thin ferromagnetic chromium tribromide (CrBr3) barriers that are sandwiched between graphene electrodes. In devices with non-magnetic barriers, conservation of momentum can be relaxed by phonon-assisted tunnelling or by tunnelling through localized states. In contrast, in the devices with ferromagnetic barriers, the major tunnelling mechanisms are the emission of magnons at low temperatures and the scattering of electrons on localized magnetic excitations at temperatures above the Curie temperature. Magnetoresistance in the graphene electrodes further suggests induced spin–orbit coupling and proximity exchange via the ferromagnetic barrier. Tunnelling with magnon emission offers the possibility of spin injection
History
School
- Science
Department
- Physics
Published in
Nature ElectronicsVolume
1Issue
6Pages
344 - 349Citation
GHAZARYAN, D. ...et al., 2018. Magnon-assisted tunnelling in van der Waals heterostructures based on CrBr3. Nature Electronics, 1, pp. 344-349.Publisher
SpringerVersion
- AM (Accepted Manuscript)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Acceptance date
2018-05-15Publication date
2018-06-13Notes
This paper was accepted for publication in the journal Nature Electronics and the definitive published version is available at https://doi.org/10.1038/s41928-018-0087-zISSN
2520-1131eISSN
2520-1131Publisher version
Language
- en