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Pàgina inicial > Articles > Articles publicats > Charge and spin transport anisotropy in nanopatterned graphene |
Data: | 2018 |
Resum: | Anisotropic electronic transport is a possible route towards nanoscale circuitry design, particularly in two-dimensional materials. Proposals to introduce such a feature in patterned graphene have to date relied on large-scale structural inhomogeneities. Here we theoretically explore how a random, yet homogeneous, distribution of zigzag-edged triangular perforations can generate spatial anisotropies in both charge and spin transport. Anisotropic electronic transport is found to persist under considerable disordering of the perforation edges, suggesting its viability under realistic experimental conditions. Furthermore, controlling the relative orientation of perforations enables spin filtering of the transmitted electrons, resulting in a half-metallic anisotropic transport regime. Our findings point towards a co-integration of charge and spin control in a two-dimensional platform of relevance for nanocircuit design. We further highlight how geometrical effects allow finite samples to display finite transverse resistances, reminiscent of Spin Hall effects, in the absence of any bulk fingerprints of such mechanisms, and explore the underlying symmetries behind this behaviour. |
Ajuts: | European Commission 665919 Ministerio de Economía y Competitividad FIS2015-67767-P Ministerio de Economía y Competitividad FIS2015-64886-C5-3-P European Commission 785219 Ministerio de Economía y Competitividad SEV-2013-0295 |
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: | Graphene ; Zigzag edge magnetism ; Antidots ; Perforations ; Spin splitting ; Anisotropic transport ; Spintronics |
Publicat a: | JPhys materials, Vol. 1, Núm. 1 (September 2018) , art. 015005, ISSN 2515-7639 |
13 p, 895.2 KB |