Quantized Transport, Strain-Induced Perfectly Conducting Modes, and Valley Filtering on Shape-Optimized Graphene Corbino Devices

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dc.contributor.authorJones G.W.
dc.contributor.authorBahamon D.A.
dc.contributor.authorCastro Neto A.H.
dc.contributor.authorPereira V.M.
dc.date.accessioned2024-03-13T00:48:37Z
dc.date.available2024-03-13T00:48:37Z
dc.date.issued2017
dc.description.abstract© 2017 American Chemical Society.The extreme mechanical resilience of graphene and the peculiar coupling it hosts between lattice and electronic degrees of freedom have spawned a strong impetus toward strain-engineered graphene where, on the one hand, strain augments the richness of its phenomenology and makes possible new concepts for electronic devices, and on the other hand, new and extreme physics might take place. Here, we demonstrate that the shape of substrates supporting graphene sheets can be optimized for approachable experiments where strain-induced pseudomagnetic fields (PMF) can be tailored by pressure for directionally selective electronic transmission and pinching-off of current flow down to the quantum channel limit. The Corbino-type layout explored here furthermore allows filtering of charge carriers according to valley and current direction, which can be used to inject or collect valley-polarized currents, thus realizing one of the basic elements required for valleytronics. Our results are based on a framework developed to realistically determine the combination of strain, external parameters, and geometry optimally compatible with the target spatial profile of a desired physical property - the PMF in this case. Characteristic conductance profiles are analyzed through quantum transport calculations on large graphene devices having the optimal shape.
dc.description.firstpage5304
dc.description.issuenumber9
dc.description.lastpage5313
dc.description.volume17
dc.identifier.doi10.1021/acs.nanolett.7b01663
dc.identifier.issn1530-6992
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/35716
dc.relation.ispartofNano Letters
dc.rightsAcesso Restrito
dc.subject.otherlanguageGraphene
dc.subject.otherlanguagepseudomagnetic fields
dc.subject.otherlanguagequantum transport
dc.subject.otherlanguagesnake states
dc.subject.otherlanguagestrain engineering
dc.subject.otherlanguagevalleytronics
dc.titleQuantized Transport, Strain-Induced Perfectly Conducting Modes, and Valley Filtering on Shape-Optimized Graphene Corbino Devices
dc.typeArtigo
local.scopus.citations31
local.scopus.eid2-s2.0-85029378574
local.scopus.subjectpseudomagnetic fields
local.scopus.subjectQuantum transport
local.scopus.subjectsnake states
local.scopus.subjectStrain engineering
local.scopus.subjectvalleytronics
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85029378574&origin=inward
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