The Electron—Phonon Enhancement Factor for Some Transition Metals
We have shown in a previous paper1 how the McMillan2 electron-phonon mass enhancement factor λ can be determined from specific heat data. New specific heat measurements for niobium and tantalum that allow λ to be determined for these materials are reported in the present paper. The addition of these results to those previously reported1 permits verification of the McMillan theory2 in a large number of transition metals. For scandium, yttrium, niobium, vanadium, and tantalum our results for λ agree quite well with the values obtained in the Bennemann and Garland3 extension of the McMillan theory. For platinum and palladium the agreement is satisfactory if strong spin-fluctuation effects are taken into account.
KeywordsBand Structure Calculation Specific Heat Measurement Electronic Specific Heat Specific Heat Data Anharmonic Contribution
Unable to display preview. Download preview PDF.
- 1.G.S. Knapp and R.W. Jones, Phys. Rev. B (1972).Google Scholar
- 3.K.H. Bennemann and J.W. Garland, in Superconductivity in d- and f- Bond Metals (AIP Conf. Proc. No. 4), American Institute of Physics, New York (1972), p. 103.Google Scholar
- 4.R.W. Jones, G.S. Knapp, and B.W. Veal (to be published).Google Scholar
- 6.K.F. Sterrett, Ph.D. Thesis, Univ. of Pittsburgh, Univ. Microfilms Publ. 22865 (1957).Google Scholar