Web of Science: 9 citations, Scopus: 8 citations, Google Scholar: citations,
Scale-invariant large nonlocality in polycrystalline graphene
Ribeiro, Mário (Nanogune)
Power, Stephen R. (Institut Català de Nanociència i Nanotecnologia)
Roche, Stephan (Institut Català de Nanociència i Nanotecnologia)
Hueso, Luis E. (Nanogune)
Casanova, Fèlix (Nanogune)

Date: 2017
Abstract: The observation of large nonlocal resistances near the Dirac point in graphene has been related to a variety of intrinsic Hall effects, where the spin or valley degrees of freedom are controlled by symmetry breaking mechanisms. Engineering strong spin or valley Hall signals on scalable graphene devices could stimulate further practical developments of spin- and valleytronics. Here we report on scale-invariant nonlocal transport in large-scale chemical vapor deposition graphene under an applied external magnetic field. Contrary to previously reported Zeeman spin Hall effect, our results are explained by field-induced spin-filtered edge states whose sensitivity to grain boundaries manifests in the nonlocal resistance. This phenomenon, related to the emergence of the quantum Hall regime, persists up to the millimeter scale, showing that polycrystalline morphology can be imprinted in nonlocal transport. This suggests that topological Hall effects in large-scale graphene materials are highly sensitive to the underlying structural morphology, limiting practical realizations.
Note: Altres ajuts: programa CERCA.
Note: Número d'acord de subvenció EC/H2020/696656
Note: Número d'acord de subvenció EC/H2020/665919
Note: Número d'acord de subvenció EC/FP7/607904
Note: Número d'acord de subvenció MINECO/MDM-2016-0618
Note: Número d'acord de subvenció MINECO/MAT2015-65159-R
Note: Número d'acord de subvenció MINECO/FIS2015-67767-P
Note: Número d'acord de subvenció MINECO/SEV-2013-0295
Rights: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. Creative Commons
Language: Anglès
Document: article ; recerca ; publishedVersion
Subject: Electronic and spintronic devices ; Electronic properties and devices ; Quantum Hall ; Spintronics
Published in: Nature communications, Vol. 8, issue 1 (Jan. 2017) , art. 2198, ISSN 2041-1723

DOI: 10.1038/s41467-017-02346-x
PMID: 29259177


8 p, 761.1 KB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (scientific output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles

 Record created 2019-06-03, last modified 2020-08-08



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