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Negative differential resistance in armchair silicene nanoribbons

Manjanath, Aaditya and Roy, Ahin and Samanta, Atanu and Singh, Abhishek K (2017) Negative differential resistance in armchair silicene nanoribbons. In: NANOTECHNOLOGY, 28 (27).

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Official URL: http://dx.doi.org/10.1088/1361-6528/aa75b6

Abstract

Due to dimensional confinement of carriers and non-trivial changes in the electronic structure, novel tunable transport properties manifest in nanoscale materials. Here, we report using firstprinciples density functional theory and non-equilibrium Green's function formalism, the occurrence of negative differential resistance (NDR) in armchair silicene nanoribbons (ASNRs). Interestingly, NDR manifests only in pristine 3n + 2 ASNRs, where n is an element of Z(+). We show that the origin of such a novel transport phenomenon lies in the bias-induced changes in the density of states of this particular family of nanoribbons. With increasing width of the nanoribbons belonging to this family, the peak-to-valley ratios of current decrease due to the increase in the number of sub-bands leading to a reduction in NDR. NDR is possible not only in 3n + 2 ASNRs, but also in mixed configurations of armchair and zigzag silicene nanoribbons. This universality of NDR along with its unprecedented width-induced tunability can be useful for silicene-based low-power logic and memory applications.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the IOP PUBLISHING LTD, TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Division of Interdisciplinary Research > Centre for Nano Science and Engineering
Depositing User: Id for Latest eprints
Date Deposited: 14 Jul 2017 04:28
Last Modified: 14 Jul 2017 04:28
URI: http://eprints.iisc.ac.in/id/eprint/57358

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