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• W3048321393 abstract "The rise and fall of the superconducting transition temperature $T_c$ upon tuning carrier density or external parameters, such as pressure or magnetic field, is ubiquitously observed in a wide range of quantum materials. In order to investigate such domes of $T_c$, we go beyond the prototypical attractive Hubbard model, and consider a lattice model of electrons coupled via instantaneous, spatially extended, attractive interactions. By numerically solving the mean-field equations, as well as going beyond mean field theory using a functional renormalization group approach, we find that for a characteristic interaction range $ell$, there exists a dome in $T_c$ around $k_F ell ! sim ! {mathcal{O}}(1)$. For multiband systems, our mean field theory shows the presence of additional domes in the vicinity of Lifshitz transitions. Our results hold in both two and three dimensions and can be intuitively understood from the geometric relation between the Fermi surface and the interaction range. Our model may be relevant for domes of $T_c$ in dilute weakly coupled superconductors or in engineered cold atom systems." @default.
• W3048321393 created "2020-08-13" @default.
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• W3048321393 date "2020-08-06" @default.
• W3048321393 modified "2023-10-03" @default.
• W3048321393 title "Domes of <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mi>T</mml:mi><mml:mi>c</mml:mi></mml:msub></mml:math> in single-band and multiband superconductors with finite-range attractive interactions" @default.
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• W3048321393 doi "https://doi.org/10.1103/physrevb.102.054504" @default.
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