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- W4297643208 abstract "We study electron-electron and electron-phonon mediated pairing in the Holstein extended Hubbard model on the Kagome lattice at the van Hove fillings, and investigate the competition and cooperation between the two pairing mechanisms. We find that electron-phonon and electron-electron pairing are cooperative in a crossover region, where the two pairing mechanisms are of comparable strength and where the filling is close to a van Hove singularity. In particular, at the $p$-type van Hove filling the two pairing mechanisms are cooperative in the $E_{1u}$ ($p$-wave) and $B_{2u}$ ($f_{y^3-3yx^2}$-wave) channels, whereas at the $m$-type van Hove filling they are cooperative in the $E_{1u}$ channel, but weakly competitive in the $B_{2u}$ channel. Moreover, we show that the electron-phonon interaction acquires a significant momentum dependence, due to the sublattice texture of the Fermi surfaces, which can promote non $s$-wave pairing. We present a detailed analysis of these pairing propensities and discuss implications for the vanadium-based kagome superconductors AV$_3$Sb$_5$." @default.
- W4297643208 created "2022-09-30" @default.
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- W4297643208 date "2022-09-06" @default.
- W4297643208 modified "2023-10-01" @default.
- W4297643208 title "Crossover between electron-electron and electron-phonon mediated pairing on the Kagome lattice" @default.
- W4297643208 doi "https://doi.org/10.48550/arxiv.2209.02351" @default.
- W4297643208 hasPublicationYear "2022" @default.
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