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- W2894552017 abstract "We present a method to considerably improve the numerical performance for solving Eliashberg-type coupled equations on the imaginary axis. Instead of the standard practice of introducing a hard numerical cutoff for treating the infinite summations involved, our scheme allows for the efficient calculation of such sums extended formally up to infinity. The method is first benchmarked with isotropic Migdal-Eliashberg theory calculations and subsequently applied to the solution of the full-bandwidth, multiband and anisotropic equations focusing on the FeSe/SrTiO$_3$ interface as a case study. Compared to the standard procedure, we reach similarly well converged results with less than one fifth of the number of frequencies for the anisotropic case, while for the isotropic set of equations we spare approximately ninety percent of the complexity. Since our proposed approximations are very general, our numerical scheme opens the possibility of studying the superconducting properties of a wide range of materials at ultra-low temperatures." @default.
- W2894552017 created "2018-10-12" @default.
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- W2894552017 date "2018-10-03" @default.
- W2894552017 modified "2023-09-27" @default.
- W2894552017 title "Improved performance of Matsubara space calculations - A case study within Eliashberg theory of superconductivity" @default.
- W2894552017 hasPublicationYear "2018" @default.
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