Spin signatures in the electrical response of graphene nanogaps

Journal article (2018)

Authors

Víctor García Suárez Universidad de Oviedo
Amador García-Fuente Universidad de Oviedo
Diego J. Carrascal Universidad de Oviedo
E. Burzuri Linares IMDEA Materials Institute, Kavli institute of nanoscience Delft, QN/Afdelingsbureau
M. Koole QN/van der Zant Lab - AS , Kavli institute of nanoscience Delft
H.S.J. van der Zant QN/van der Zant Lab - AS , Kavli institute of nanoscience Delft
Maria El Abbassi University of Basel, Swiss Federal Laboratories for Materials Science and Technology (Empa)
Michel Calame Swiss Federal Laboratories for Materials Science and Technology (Empa), University of Basel
Jaime Ferrer IMDEA Materials Institute, Universidad de Oviedo
Research Group
QN/Afdelingsbureau
Copyright: © 2018 Víctor M. García-Suárez, Amador García-Fuente, Diego J. Carrascal, E. Burzuri Linares, M. Koole, H.S.J. van der Zant, Maria El Abbassi, Michel Calame, Jaime Ferrer
DOI
help_outline
https://doi.org/10.1039/c8nr06123h
More Info
expand_more

Published Date

2018

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Research Group

QN/Afdelingsbureau

Abstract

We analyse the electrical response of narrow graphene nanogaps in search for transport signatures stemming from spin-polarized edge states. We find that the electrical transport across graphene nanogaps having perfectly defined zigzag edges does not carry any spin-related signature. We also analyse the magnetic and electrical properties of nanogaps whose electrodes have wedges that possibly occur in the currently fabricated nanogaps. These wedges can host spin polarized wedge low-energy states due to the bipartite nature of the graphene lattice. We find that these spin-polarized low-energy modes give rise to low-voltage signatures in the differential conductance and to distinctive features in the stability diagrams. These are caused by fully spin-polarized currents.