Theoretical Limit of MOSFET Subthreshold Swing at Sub-Kelvin Temperatures
Fuente:
arXiv
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| Autore principale: | |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866914054883246080 |
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| author | Beckers, Arnout |
| author_facet | Beckers, Arnout |
| contents | Fully conductive band tails cause the subthreshold swing to saturate at temperatures above 1 K. However, recent measurements indicate that below 1 K, the subthreshold swing in certain MOSFET structures resumes a linear scaling with temperature. Following this ultra-steep behavior, a new type of plateau has been measured below 1 K. In this letter, we show that hybrid band tails, with both traps and mobile states, explain this new plateau. Furthermore, hybrid band tails explain various non-saturating behaviors above 1 K. Remarkably, for entirely non-conductive band tails, the simulations and theory predict a third type of plateau below 10 mK. We hypothesize that this represents the lower bound of subthreshold swing at sub-Kelvin temperatures, which is a testable prediction from the theory. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_09276 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Theoretical Limit of MOSFET Subthreshold Swing at Sub-Kelvin Temperatures Beckers, Arnout Mesoscale and Nanoscale Physics Fully conductive band tails cause the subthreshold swing to saturate at temperatures above 1 K. However, recent measurements indicate that below 1 K, the subthreshold swing in certain MOSFET structures resumes a linear scaling with temperature. Following this ultra-steep behavior, a new type of plateau has been measured below 1 K. In this letter, we show that hybrid band tails, with both traps and mobile states, explain this new plateau. Furthermore, hybrid band tails explain various non-saturating behaviors above 1 K. Remarkably, for entirely non-conductive band tails, the simulations and theory predict a third type of plateau below 10 mK. We hypothesize that this represents the lower bound of subthreshold swing at sub-Kelvin temperatures, which is a testable prediction from the theory. |
| title | Theoretical Limit of MOSFET Subthreshold Swing at Sub-Kelvin Temperatures |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2410.09276 |