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Optimum Contact Configurations for Quasi-One-Dimensional Phosphorene Nanodevices
We employ atomistic quantum transport simulations based on non-equilibrium Green’s function (NEGF) formalism of quasi-one-dimensional (quasi-1D) phosphorene, or phosphorene nanoribbons (PNRs), to explore routes towards minimizing contact resistance (R(C)) in devices based on such nanostructures. The...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10254546/ https://www.ncbi.nlm.nih.gov/pubmed/37299662 http://dx.doi.org/10.3390/nano13111759 |
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author | Poljak, Mirko Matić, Mislav |
author_facet | Poljak, Mirko Matić, Mislav |
author_sort | Poljak, Mirko |
collection | PubMed |
description | We employ atomistic quantum transport simulations based on non-equilibrium Green’s function (NEGF) formalism of quasi-one-dimensional (quasi-1D) phosphorene, or phosphorene nanoribbons (PNRs), to explore routes towards minimizing contact resistance (R(C)) in devices based on such nanostructures. The impact of PNR width scaling from ~5.5 nm down to ~0.5 nm, different hybrid edge-and-top metal contact configurations, and various metal–channel interaction strengths on the transfer length and R(C) is studied in detail. We demonstrate that optimum metals and top-contact lengths exist and depend on PNR width, which is a consequence of resonant transport and broadening effects. We find that moderately interacting metals and nearly edge contacts are optimum only for wider PNRs and phosphorene, providing a minimum R(C) of ~280 Ωμm. Surprisingly, ultra-narrow PNRs benefit from weakly interacting metals combined with long top contacts that lead to an added R(C) of only ~2 Ωμm in the 0.49 nm wide quasi-1D phosphorene nanodevice. |
format | Online Article Text |
id | pubmed-10254546 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-102545462023-06-10 Optimum Contact Configurations for Quasi-One-Dimensional Phosphorene Nanodevices Poljak, Mirko Matić, Mislav Nanomaterials (Basel) Article We employ atomistic quantum transport simulations based on non-equilibrium Green’s function (NEGF) formalism of quasi-one-dimensional (quasi-1D) phosphorene, or phosphorene nanoribbons (PNRs), to explore routes towards minimizing contact resistance (R(C)) in devices based on such nanostructures. The impact of PNR width scaling from ~5.5 nm down to ~0.5 nm, different hybrid edge-and-top metal contact configurations, and various metal–channel interaction strengths on the transfer length and R(C) is studied in detail. We demonstrate that optimum metals and top-contact lengths exist and depend on PNR width, which is a consequence of resonant transport and broadening effects. We find that moderately interacting metals and nearly edge contacts are optimum only for wider PNRs and phosphorene, providing a minimum R(C) of ~280 Ωμm. Surprisingly, ultra-narrow PNRs benefit from weakly interacting metals combined with long top contacts that lead to an added R(C) of only ~2 Ωμm in the 0.49 nm wide quasi-1D phosphorene nanodevice. MDPI 2023-05-29 /pmc/articles/PMC10254546/ /pubmed/37299662 http://dx.doi.org/10.3390/nano13111759 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Poljak, Mirko Matić, Mislav Optimum Contact Configurations for Quasi-One-Dimensional Phosphorene Nanodevices |
title | Optimum Contact Configurations for Quasi-One-Dimensional Phosphorene Nanodevices |
title_full | Optimum Contact Configurations for Quasi-One-Dimensional Phosphorene Nanodevices |
title_fullStr | Optimum Contact Configurations for Quasi-One-Dimensional Phosphorene Nanodevices |
title_full_unstemmed | Optimum Contact Configurations for Quasi-One-Dimensional Phosphorene Nanodevices |
title_short | Optimum Contact Configurations for Quasi-One-Dimensional Phosphorene Nanodevices |
title_sort | optimum contact configurations for quasi-one-dimensional phosphorene nanodevices |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10254546/ https://www.ncbi.nlm.nih.gov/pubmed/37299662 http://dx.doi.org/10.3390/nano13111759 |
work_keys_str_mv | AT poljakmirko optimumcontactconfigurationsforquasionedimensionalphosphorenenanodevices AT maticmislav optimumcontactconfigurationsforquasionedimensionalphosphorenenanodevices |