Quantum Monte Carlo study of thin parahydrogen films on graphite
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arXiv
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866913347648094208 |
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| author | Hu, Jie-Ru Boninsegni, Massimo |
| author_facet | Hu, Jie-Ru Boninsegni, Massimo |
| contents | The low-temperature properties of one and two layers of parahydrogen adsorbed on graphite are investigated theoretically through Quantum Monte Carlo simulations. We adopt a microscopic model that explicitly includes the corrugation of the substrate. We study the phase diagram of a monolayer up to second layer promotion, and the possible occurrence of superfluidity in the second layer. We obtain results down to a temperature as low as 8 mK. We find second-layer promotion to occur at a considerably greater coverage than obtained in previous calculations and estimated experimentally; moreover, we find no evidence of a possible finite superfluid response in the second layer, disproving recent theoretical predictions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_12637 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Quantum Monte Carlo study of thin parahydrogen films on graphite Hu, Jie-Ru Boninsegni, Massimo Other Condensed Matter The low-temperature properties of one and two layers of parahydrogen adsorbed on graphite are investigated theoretically through Quantum Monte Carlo simulations. We adopt a microscopic model that explicitly includes the corrugation of the substrate. We study the phase diagram of a monolayer up to second layer promotion, and the possible occurrence of superfluidity in the second layer. We obtain results down to a temperature as low as 8 mK. We find second-layer promotion to occur at a considerably greater coverage than obtained in previous calculations and estimated experimentally; moreover, we find no evidence of a possible finite superfluid response in the second layer, disproving recent theoretical predictions. |
| title | Quantum Monte Carlo study of thin parahydrogen films on graphite |
| topic | Other Condensed Matter |
| url | https://arxiv.org/abs/2403.12637 |