Abstract
Applications of the first-principles linear-response method for calculating electron–phonon coupling parameters are presented. Calculations show that the electron–phonon coupling in the low-temperature 9R phase of Li is significantly weaker than in the room-temperature b.c.c. phase, which helps explain the observed absence of a superconducting transition down to the mK regime. Results for the electron–phonon interaction in compressed S indicate that the surprisingly high superconducting Tc of 17 K observed at 160 GPa arises from a combination of a moderately large electron–phonon mass enhancement parameter and a very high phonon energy scale for the compressed lattice.
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