Rudin, Sven P. and Bauer, R. and Liu, A. Y. and Freericks, J. K. (1998) Reevaluating electron-phonon coupling strengths: Indium as a test case for ab initio and many-body theory methods. PHYSICAL REVIEW B, 58 (21). pp. 14511-14517. ISSN 1098-0121, 1550-235X
Full text not available from this repository.Abstract
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 alpha(2)F(omega) that translates into a relative tunneling conductance that agrees with experiment to within one part in 10(3). The many-body theory calculations-where alpha(2)F(omega) 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 alpha(2)F(omega), the mass-renormalization parameter lambda, we report 0.9+/-0.1, 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 alpha(tr)(2)F(omega) from which we calculate the resistivity as a function of temperature in good agreement with experiment. [S0163-1829(98)01245-4].
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | LINEAR-RESPONSE CALCULATIONS; ABINITIO CALCULATION; COULOMB REPULSION; FORCE-CONSTANTS; SUPERCONDUCTORS; METALS; PSEUDOPOTENTIALS; DISPERSIONS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 21 Feb 2023 09:19 |
| Last Modified: | 21 Feb 2023 09:19 |
| URI: | https://pred.uni-regensburg.de/id/eprint/49321 |
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