The role of optic phonons in the superconductivity of PdH and PdD

✍ Scribed by Nathan Jacobi; Laurent G. Caron

• Publisher: Springer US
• Year: 1978
• Tongue: English
• Weight: 403 KB
• Volume: 30
• Category: Article
• ISSN: 0022-2291
• DOI: 10.1007/bf00115516

✦ Synopsis

Using a simple, isotropic phonon model, the contribution of optic modes to the electron-phonon coupling constant is found to exceed that of acoustic phonons only slightly. The Coulomb pseudopotential parameter tz * is found to be rather small. The inverse isotope effect is analyzed and related to changes in both the hydrogen-palladium and hydrogen-hydrogen force constants.

The reported ratios of Aop/Aac vary from 0.2 (Hertel) and 0.5 (Gan-1 78 2 guly ) to 2.5-3 (Burger and co-workers ', Papaconstantopoulos and Klein, including later modifications by Klein et al.9).