The origin of the anomalous superconducting properties of MgB2

By H. Choi, David Roundy, Hong-xiang Sun, Marvin L. Cohen, Steven G. Louie. Nature, 2002

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Two-band superconductor magnesium diboride (2008, methodology): “The electron–phonon coupling constant matrix elements have been calculated by various groups: λσσ = 0.96, λππ = 0.29, λσπ = 0.23, λπσ = 0.17 and the total λ = 0.77 by Liu and coworkers [94, 102]; λσσ = 1.017, λππ = 0.448, λσπ = 0.213, λπσ = 0.155 and λ = 0.87 by Golubov et al [99]; λσσ = 0.78, λππ =”
Odd-frequency superconductivity (2017, neutral): “5 Å−2/eV and mb = 1 Å−2/eV; chemical potentials, μa = μb = 2eV; s-wave gaps, ∆aa = 2meV, ∆bb = 7meV, ∆ab = ∆ba = 0, consistent with MgB2(Choi et al., 2002); interband scattering, Γ = 10 meV; dissipation described by η = 1meV; and a drive U(t) =U0cos(Ω0t) with U0 = 10meV, and Ω0 = 1meV (242 GHz).”
Angle-resolved photoemission studies of quantum materials (2020, positive): “Subsequently, interband pairing was considered to play a significant role in determining the coupling strength and Tc (Choi et al., 2002; Dolgov et al., 2009).”
Electrodynamics of correlated electron materials (2011, background): “(14) and show a clear reduction in the coherence peak with increasing 16 (Choi et al., 2002; Gorshunov et al., 2001; Kortus et al., 2001; Kuzmenko et al., 2002; Liu et al., 2001; Pimenov et al., 2002) 22 mean free path as the clean limit is approached.”