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Evolution of Superconductivity in Twisted Graphene Multilayers

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arxiv 2403.00903 v2 pith:RUDFABUE submitted 2024-03-01 cond-mat.mes-hall cond-mat.str-elcond-mat.supr-con

Min Long , Alejandro Jimeno-Pozo , Hector Sainz-Cruz , Pierre A. Pantaleon , Francisco Guinea This is my paper · ORCID
classification cond-mat.mes-hallcond-mat.str-elcond-mat.supr-con
keywords twistedgraphenebilayersdoublebilayerhelicalmoirmultilayers
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The group of moir\'e 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 moir\'e Umklapp processes in the different systems.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Double-edged Role of Interactions in Superconducting Twisted Bilayer Graphene

    cond-mat.mes-hall 2024-12 conditional novelty 7.0 of 10

    In twisted bilayer graphene, increasing the dielectric screening of the substrate shrinks the superconducting dome at the magic angle, while it allows superconductivity to appear at a larger twist angle where correlat...

  2. Fractional Chern mosaic in supermoir\'e graphene

    cond-mat.str-el 2024-11 conditional novelty 7.0 of 10

    Helical trilayer graphene with momentum-dependent tunneling is predicted to host a fractional Chern mosaic at filling 3+1/3: local fractional Chern insulators whose fractionalization pattern varies on the supermoiré scale.

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