Beyond Eliashberg superconductivity in MgB2: anharmonicity, two-phonon scattering, and multiple gaps.
By Amy Y. Liu, I. Mazin, J. Kortus. Physical Review Letters, 2001
762 citations recorded by the source corpus.
Density-functional calculations of the phonon spectrum and electron-phonon coupling in MgB (2) are presented. The E(2g) phonons, which involve in-plane B displacements, couple strongly to the p(x,y) electronic bands. The isotropic electron-phonon coupling constant is calculated to be about 0.8. Allowing for different order parameters in different bands, the superconducting lambda in the clean limit is calculated to be significantly larger. The E(2g) phonons are strongly anharmonic, and the nonlinear contribution to the coupling between the E(2g) modes and the p(x,y) bands is significant.
Subfields: Condensed Matter Physics, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/cd0f61650fabca88298376ab70ce49dfc0d256e6
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In Condensed Matter Physics
In Materials Chemistry
Citations in the corpus
- Iron-based superconductors at high magnetic fields (2011, background): “Many unusual features of FBSs set them apart from the more conventional two-band s-wave superconductor MgB2 in which the rather high Tc is caused by strong intraband pairing and weak interband pairing mediated by phonons [12–14].”
- Two-band superconductor magnesium diboride (2008, methodology): “9 meV using the λij values from Liu et al [102] and ω0 = 6.”