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- W2022036757 abstract "Taking as a starting point the results of LDA calculations, which show that in ${rm MgB_{2}}$ the phonons have a strong quartic anharmonicity and that the bond-stretching electron-phonon interaction (EPI) has both a linear and a large quadratic component, we propose a model Hamiltonian which successfully matches a number of experimental evidences. We relate the single critical temperature for both superconducting gaps to a phonon-induced inter-band coupling whose amplitude increases with temperature. We also obtain phonon frequencies and linewidths depending on the band filling, as well as band energies and hybridization amplitudes depending on the phonon number." @default.
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- W2022036757 date "2003-09-01" @default.
- W2022036757 modified "2023-10-17" @default.
- W2022036757 title "A model Hamiltonian for MgB $mathsf{_{2}}$ which takes into account its unusual phononic features" @default.
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- W2022036757 doi "https://doi.org/10.1140/epjb/e2003-00251-y" @default.
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