Superconducting Gap of Pressure Stabilized (Al0.5Zr0.5)H3 from Ab Initio Anisotropic Migdal–Eliashberg Theory
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DOI: 10.1021/acsomega.2c02447
Abstract: Motivated by Matthias’ sixth rule for finding new superconducting materials in a cubic symmetry, we report the cluster expansion calculations, based on the density functional theory, of the superconducting properties of Al0.5Zr0.5H3. The Al0.5Zr0.5H3 structure… read more here.
Keywords: pressure; anisotropic migdal; migdal eliashberg; al0 5zr0 ... See more keywords
Efficient ab initio Migdal-Eliashberg calculation considering the retardation effect in phonon-mediated superconductors
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DOI: 10.1103/physrevb.102.134503
Abstract: We formulate an efficient scheme to perform a Migdal-Eliashberg calculation considering the retardation effect from first principles. While the conventional approach requires a huge number of Matsubara frequencies, we show that the intermediate representation of… read more here.
Keywords: retardation effect; calculation considering; eliashberg calculation; considering retardation ... See more keywords
Spectral properties and enhanced superconductivity in renormalized Migdal-Eliashberg theory
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DOI: 10.1103/physrevb.103.024520
Abstract: Migdal-Eliashberg theory describes the properties of the normal and superconducting states of electron-phonon-mediated superconductors based on a perturbative treatment of the electron-phonon interactions. It is necessary to include both electron and phonon self-energies self-consistently in… read more here.
Keywords: phonon; eliashberg theory; electron phonon; migdal eliashberg ... See more keywords
Breakdown of the Migdal-Eliashberg theory: A determinant quantum Monte Carlo study
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DOI: 10.1103/physrevb.97.140501
Abstract: The superconducting (SC) and charge-density-wave (CDW) susceptibilities of the two dimensional Holstein model are computed using determinant quantum Monte Carlo (DQMC), and compared with results computed using the Migdal-Eliashberg (ME) approach. We access temperatures as… read more here.
Keywords: determinant quantum; monte carlo; quantum monte; migdal eliashberg ... See more keywords