Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Poljak, Mirko, Matić, Mislav
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
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
_version_ 1785056670098915328
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