Assessment of theoretical determinations of the electron-phonon coupling parameter in metals and intermetallic compounds

H. B. Radousky, T. Jarlborg, G. S. Knapp, Arthur J Freeman

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The electron-phonon coupling parameter e-ph, while playing a centrally important role in superconductivity and other phenomena, is still a difficult quantity to determine from first-principles theory. The availability of accurate ab initio self-consistent energy-band calculations of partial and total density of states (DOS) allows to be determined from the electronic specific heat or from simple theoretical treatments such as the rigid-ion approximation. We have assessed the accuracy of these determinations (and the band-structure results) in a number of transition metals and A15 and C15 intermetallic compounds. We include comparisons with results obtained with the use of the McMillan-equation parametrization of Tc along with experimental results from tunneling measurements, NMR, and comparisons of high- and low-T specific-heat data. The results of these comparisons show that for many of the high-DOS materials, serious discrepancies exist between the theoretical and experimental determinations. The role of spin fluctuations and lattice transformations is discussed in connection with these results.

Original languageEnglish
Pages (from-to)1208-1222
Number of pages15
JournalPhysical Review B
Volume26
Issue number3
DOIs
Publication statusPublished - 1982

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Band structure
Specific heat
Intermetallics
intermetallics
Metals
Spin fluctuations
Electrons
Superconductivity
specific heat
metals
Transition metals
electrons
Nuclear magnetic resonance
Availability
Ions
energy bands
availability
superconductivity
transition metals
nuclear magnetic resonance

ASJC Scopus subject areas

  • Condensed Matter Physics

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Assessment of theoretical determinations of the electron-phonon coupling parameter in metals and intermetallic compounds. / Radousky, H. B.; Jarlborg, T.; Knapp, G. S.; Freeman, Arthur J.

In: Physical Review B, Vol. 26, No. 3, 1982, p. 1208-1222.

Research output: Contribution to journalArticle

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