Impact of a $MoS_2$ monolayer on the nanoscale thermoelastic response of silicon heterostructures
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| Autores principales: | , , , , , , , , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| author | Soranzio, Davide Puntel, Denny Tuniz, Manuel Majchrzak, Paulina E. Milloch, Alessandra Olsen, Nicholas M. Bronsch, Wibke Jessen, Bjarke S. Fainozzi, Danny Cresi, Jacopo S. Pelli De Angelis, Dario Foglia, Laura Mincigrucci, Riccardo Zhu, Xiaoyang Dean, Cory R. Ulstrup, Søren Banfi, Francesco Giannetti, Claudio Parmigiani, Fulvio Bencivenga, Filippo Cilento, Federico |
| author_facet | Soranzio, Davide Puntel, Denny Tuniz, Manuel Majchrzak, Paulina E. Milloch, Alessandra Olsen, Nicholas M. Bronsch, Wibke Jessen, Bjarke S. Fainozzi, Danny Cresi, Jacopo S. Pelli De Angelis, Dario Foglia, Laura Mincigrucci, Riccardo Zhu, Xiaoyang Dean, Cory R. Ulstrup, Søren Banfi, Francesco Giannetti, Claudio Parmigiani, Fulvio Bencivenga, Filippo Cilento, Federico |
| contents | Understanding the thermoelastic response of a nanostructure is crucial for the choice of materials and interfaces in electronic devices with improved and tailored transport properties, at the length scales of the present technology. Here we show how the deposition of a $MoS_2$ monolayer can strongly modify the nanoscale thermoelastic dynamics of silicon substrates close to their interface. We achieve this result by creating a transient grating with extreme ultraviolet light, using ultrashort free-electron laser pulses, whose $\approx$84 nm period is comparable to the size of elements typically used in nanodevices, such as electric contacts and nanowires. The thermoelastic response, featured by coherent acoustic waves and an incoherent relaxation, is tangibly modified by the presence of monolayer $MoS_2$. Namely, we observed a major reduction of the amplitude of the surface mode, which is almost suppressed, while the longitudinal mode is basically unperturbed, aside from a faster decay of the acoustic modulations. We interpret this behavior as a selective modification of the surface elasticity and we discuss the conditions to observe such effect, which might be of immediate relevance for the design of Si-based nanoscale devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_19255 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Impact of a $MoS_2$ monolayer on the nanoscale thermoelastic response of silicon heterostructures Soranzio, Davide Puntel, Denny Tuniz, Manuel Majchrzak, Paulina E. Milloch, Alessandra Olsen, Nicholas M. Bronsch, Wibke Jessen, Bjarke S. Fainozzi, Danny Cresi, Jacopo S. Pelli De Angelis, Dario Foglia, Laura Mincigrucci, Riccardo Zhu, Xiaoyang Dean, Cory R. Ulstrup, Søren Banfi, Francesco Giannetti, Claudio Parmigiani, Fulvio Bencivenga, Filippo Cilento, Federico Materials Science Mesoscale and Nanoscale Physics Understanding the thermoelastic response of a nanostructure is crucial for the choice of materials and interfaces in electronic devices with improved and tailored transport properties, at the length scales of the present technology. Here we show how the deposition of a $MoS_2$ monolayer can strongly modify the nanoscale thermoelastic dynamics of silicon substrates close to their interface. We achieve this result by creating a transient grating with extreme ultraviolet light, using ultrashort free-electron laser pulses, whose $\approx$84 nm period is comparable to the size of elements typically used in nanodevices, such as electric contacts and nanowires. The thermoelastic response, featured by coherent acoustic waves and an incoherent relaxation, is tangibly modified by the presence of monolayer $MoS_2$. Namely, we observed a major reduction of the amplitude of the surface mode, which is almost suppressed, while the longitudinal mode is basically unperturbed, aside from a faster decay of the acoustic modulations. We interpret this behavior as a selective modification of the surface elasticity and we discuss the conditions to observe such effect, which might be of immediate relevance for the design of Si-based nanoscale devices. |
| title | Impact of a $MoS_2$ monolayer on the nanoscale thermoelastic response of silicon heterostructures |
| topic | Materials Science Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2403.19255 |