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Reevaluating electron-phonon coupling strengths: Indium as a test case for ab initio and many-body theory methods

Physical Review B - Condensed Matter and Materials Physics, ISSN: 1550-235X, Vol: 58, Issue: 21, Page: 14511-14517
1998
  • 14
    Citations
  • 0
    Usage
  • 8
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    14
    • Citation Indexes
      14
  • Captures
    8

Article Description

Using indium as a test case, we investigate the accuracy of the electron-phonon coupling calculated with state-of-the-art ab initio and many-body theory methods. The ab initio calculations—where electrons are treated in the local-density approximation, and phonons and the electron-phonon interaction are treated within linear response—predict an electron-phonon spectral function (Formula presented) that translates into a relative tunneling conductance that agrees with experiment to within one part in (Formula presented) The many-body theory calculations— where (Formula presented) is extracted from tunneling data by means of the McMillan-Rowell tunneling inversion method —provide spectral functions that depend strongly on details of the inversion process. For the most important moment of (Formula presented) the mass-renormalization parameter (Formula presented) we report (Formula presented) in contrast to the value 0.805 quoted for nearly three decades in the literature. The ab initio calculations also provide the transport electron-phonon spectral function (Formula presented) from which we calculate the resistivity as a function of temperature in good agreement with experiment. © 1998 The American Physical Society.

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