Evolution of Superconductivity in Twisted Graphene Multilayers
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arXiv
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| Format: | Preprint |
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2024
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| author | Long, Min Jimeno-Pozo, Alejandro Sainz-Cruz, Hector Pantaleon, Pierre A. Guinea, Francisco |
| author_facet | Long, Min Jimeno-Pozo, Alejandro Sainz-Cruz, Hector Pantaleon, Pierre A. Guinea, Francisco |
| contents | The group of moiré graphene superconductors keeps growing, and by now it contains twisted graphene multilayers and twisted double bilayers. We analyze the contribution of long range charge fluctuations in the superconductivity of twisted double graphene bilayers and helical trilayers, and compare the results to twisted bilayer graphene. We apply a diagrammatic approach which depends on a few, well known parameters. We find that the critical temperature and the order parameter differ significantly between twisted double bilayers and helical trilayers on one hand, and twisted bilayer graphene on the other. We show that this trend, consistent with experiments, can be associated to the role played by moiré Umklapp processes in the different systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_00903 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Evolution of Superconductivity in Twisted Graphene Multilayers Long, Min Jimeno-Pozo, Alejandro Sainz-Cruz, Hector Pantaleon, Pierre A. Guinea, Francisco Mesoscale and Nanoscale Physics Strongly Correlated Electrons Superconductivity The group of moiré graphene superconductors keeps growing, and by now it contains twisted graphene multilayers and twisted double bilayers. We analyze the contribution of long range charge fluctuations in the superconductivity of twisted double graphene bilayers and helical trilayers, and compare the results to twisted bilayer graphene. We apply a diagrammatic approach which depends on a few, well known parameters. We find that the critical temperature and the order parameter differ significantly between twisted double bilayers and helical trilayers on one hand, and twisted bilayer graphene on the other. We show that this trend, consistent with experiments, can be associated to the role played by moiré Umklapp processes in the different systems. |
| title | Evolution of Superconductivity in Twisted Graphene Multilayers |
| topic | Mesoscale and Nanoscale Physics Strongly Correlated Electrons Superconductivity |
| url | https://arxiv.org/abs/2403.00903 |