visitant ::
identificació
|
|||||||||||||||
Cerca | Lliura | Ajuda | Servei de Biblioteques | Sobre el DDD | Català English Español |
Pàgina inicial > Articles > Articles publicats > Scale-invariant large nonlocality in polycrystalline graphene |
Data: | 2017 |
Resum: | 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. |
Ajuts: | European Commission 696656 European Commission 665919 European Commission 607904 Ministerio de Economía y Competitividad MDM-2016-0618 Ministerio de Economía y Competitividad MAT2015-65159-R Ministerio de Economía y Competitividad FIS2015-67767-P Ministerio de Economía y Competitividad SEV-2013-0295 |
Nota: | Altres ajuts: programa CERCA. |
Drets: | 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. |
Llengua: | Anglès |
Document: | Article ; recerca ; Versió publicada |
Matèria: | Electronic and spintronic devices ; Electronic properties and devices ; Quantum Hall ; Spintronics |
Publicat a: | Nature communications, Vol. 8, issue 1 (Jan. 2017) , art. 2198, ISSN 2041-1723 |
8 p, 761.1 KB |