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A critical assessment on the electron transport through dehydrogenated intrinsically conducting channels in graphane-graphene hybrids
Univ Fed Bahia, Brazil.
Univ Fed Bahia, Brazil.
Linköping University, Department of Physics, Chemistry and Biology, Theoretical Chemistry. Linköping University, Faculty of Science & Engineering. Swedish Meteorol and Hydrol Inst, Sweden.
Univ Fed Bahia, Brazil.
2019 (English)In: MATERIALS RESEARCH EXPRESS, ISSN 2053-1591, Vol. 6, no 8, article id 085618Article in journal (Refereed) Published
Abstract [en]

We investigate the electron transport properties of different extended line/ribbon defects in hydrogenated graphene (graphane) by means of density functional theory combined with the non-equilibrium Greens function formalism. The calculated zero-bias transmission profiles show that dehydrogenated tracks in graphane are promising candidates for fabricating printed nanocircuits. Our calculations also indicate that the gate-induced transmission probability of a completely dehydrogenated zigzag carbon line (DHZCL) in a freestanding graphane sheet opens a conduction channel in its insulating structure. The voltage-dependent transmission tends to increase for two weakly interacting DHZCL defects, although the transmission spectra critically depend on the proximity of these dehydrogenated lines. The current response to a bias voltage is also analyzed for the proposed defective devices and the calculated I-V characteristics show that one or two weakly interacting DHZCL defects in graphane behave as fair conduction channels from a certain threshold voltage. However, two immediately neighbor line defects (i.e., acene-type defects) exhibit a conducting behavior increasing from 0.0 to 0.2 V and a feature of a negative differential resistance effect under bias voltage in the 0.25-0.5 V range. These results suggest that extended 1D/2D defects in graphane-graphene hybrid platforms could be properly exploited for electronic applications in solid-state chemically gated graphene field-effect transistor.

Place, publisher, year, edition, pages
IOP PUBLISHING LTD , 2019. Vol. 6, no 8, article id 085618
Keywords [en]
graphane-graphene hybrids; electron transport; conductance; extended defects
National Category
Other Materials Engineering
Identifiers
URN: urn:nbn:se:liu:diva-158039DOI: 10.1088/2053-1591/ab1fb5ISI: 000468661000001OAI: oai:DiVA.org:liu-158039DiVA, id: diva2:1330183
Note

Funding Agencies|Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior-Brasil (CAPES) [001]; Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)

Available from: 2019-06-25 Created: 2019-06-25 Last updated: 2019-06-25

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  • apa
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