Electron-phonon interaction in bulk Pb: Beyond the Fermi surface

I. Yu. Sklyadneva, R. Heid, P. M. Echenique, K.-B. Bohnen, and E. V. Chulkov
Phys. Rev. B 85, 155115 – Published 6 April 2012

Abstract

The electron-phonon interaction in bulk Pb and the influence of spin-orbit coupling (SOC) on the pairing strength are investigated within the density-functional theory and linear-response approach in the mixed-basis pseudopotential representation. We find that the SOC-induced modifications of both electronic bands and lattice vibrations result in striking changes in the phonon-induced scattering of excited electrons (holes). The strength of the momentum-averaged electron-phonon interaction λ(E) ranges from 0 to 2.5 while the contribution to λ(E) from particular electronic states can even exceed 4. It is found that the coupling strength is exceedingly strong for phonon-induced transitions between electronic states of p and d symmetry. The electron-phonon coupling in Pb also shows a band dependence which, in particular, results in two different sets of electron-phonon coupling parameters on the two sheets of the Fermi surface.

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  • Received 31 January 2012

DOI:https://doi.org/10.1103/PhysRevB.85.155115

©2012 American Physical Society

Authors & Affiliations

I. Yu. Sklyadneva1,2,3,4, R. Heid1, P. M. Echenique2,5,6, K.-B. Bohnen1, and E. V. Chulkov2,5,6

  • 1Karlsruher Institut für Technologie, Institut für Festkörperphysik, D-76021 Karlsruhe, Germany
  • 2Donostia International Physics Center (DIPC), 20018 San Sebastián/Donostia, Basque Country, Spain
  • 3Institute of Strength Physics and Materials Science, SB RAS, 634021, Tomsk, Russia
  • 4Tomsk State University, 6340501, Tomsk, Russia
  • 5Departamento de Física de Materiales, Facultad de Ciencias Químicas, UPV/EHU, Apartado 1072, 20080 San Sebastián/Donostia, Basque Country, Spain
  • 6Centro de Física de Materiales CFM - Materials Physics Center MPC, Centro Mixto CSIC-UPV/EHU, 20018 San Sebastian/Donostia, Spain

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Issue

Vol. 85, Iss. 15 — 15 April 2012

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