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 (<i>R<sub>C</sub></i>) in d...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-05-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/11/1759 |
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| author | Mirko Poljak Mislav Matić |
| author_facet | Mirko Poljak Mislav Matić |
| author_sort | Mirko Poljak |
| collection | DOAJ |
| 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 (<i>R<sub>C</sub></i>) 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 <i>R<sub>C</sub></i> 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 <i>R<sub>C</sub></i> of ~280 Ωμm. Surprisingly, ultra-narrow PNRs benefit from weakly interacting metals combined with long top contacts that lead to an added <i>R<sub>C</sub></i> of only ~2 Ωμm in the 0.49 nm wide quasi-1D phosphorene nanodevice. |
| first_indexed | 2024-03-11T03:00:56Z |
| format | Article |
| id | doaj.art-ac4dc8369ea64c8e8252e48089180f3a |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-11T03:00:56Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-ac4dc8369ea64c8e8252e48089180f3a2023-11-18T08:19:08ZengMDPI AGNanomaterials2079-49912023-05-011311175910.3390/nano13111759Optimum Contact Configurations for Quasi-One-Dimensional Phosphorene NanodevicesMirko Poljak0Mislav Matić1Computational Nanoelectronics Group, Faculty of Electrical Engineering and Computing, University of Zagreb, 10000 Zagreb, CroatiaComputational Nanoelectronics Group, Faculty of Electrical Engineering and Computing, University of Zagreb, 10000 Zagreb, CroatiaWe 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 (<i>R<sub>C</sub></i>) 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 <i>R<sub>C</sub></i> 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 <i>R<sub>C</sub></i> of ~280 Ωμm. Surprisingly, ultra-narrow PNRs benefit from weakly interacting metals combined with long top contacts that lead to an added <i>R<sub>C</sub></i> of only ~2 Ωμm in the 0.49 nm wide quasi-1D phosphorene nanodevice.https://www.mdpi.com/2079-4991/13/11/1759phosphoreneblack phosphorusnanoribbonquasi-one-dimensionalquantum transporttransfer length |
| spellingShingle | Mirko Poljak Mislav Matić Optimum Contact Configurations for Quasi-One-Dimensional Phosphorene Nanodevices Nanomaterials phosphorene black phosphorus nanoribbon quasi-one-dimensional quantum transport transfer length |
| 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 | phosphorene black phosphorus nanoribbon quasi-one-dimensional quantum transport transfer length |
| url | https://www.mdpi.com/2079-4991/13/11/1759 |
| work_keys_str_mv | AT mirkopoljak optimumcontactconfigurationsforquasionedimensionalphosphorenenanodevices AT mislavmatic optimumcontactconfigurationsforquasionedimensionalphosphorenenanodevices |