Have mysterious topological valley currents been observed in graphene superlattices?
Roche, Stephan (Institut Català de Nanociència i Nanotecnologia)
Power, Stephen R. (Trinity College Dublin. School of Physics)
Nikolić, Branislav K. (University of Delaware. Department of Physics and Astronomy)
Garcia, José H. (Institut Català de Nanociència i Nanotecnologia)
Jauho, Antti-Pekka (Technical University of Denmark. Center for Nanostructured Graphene)

Date:	2022
Abstract:	We provide a critical discussion concerning the claim of topological valley currents, driven by a global Berry curvature and valley Hall effect proposed in recent literature. After pointing out a major inconsistency of the theoretical scenario proposed to interpret giant nonlocal resistance, we discuss various possible alternative explanations and open directions of research to solve the mystery of nonlocal transport in graphene superlattices.
Grants:	European Commission 881603 Ministerio de Economía y Competitividad SEV-2017-0706
Note:	Altres ajuts: ICN2 is funded by the CERCA Programme/Generalitat de Catalunya
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.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Graphene ; Topological valley currents ; Graphene superlattices ; Nonlocal resistance
Published in:	JPhys materials, Vol. 5, issue 2 (April 2022) , art. 21001, ISSN 2515-7639

DOI: 10.1088/2515-7639/ac452a

5 p, 656.4 KB

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