Year: 2018
Type: article
Abstract: Eliashberg theory provides a theoretical framework for understanding the phenomenon of superconductivity when pairing between two electrons is mediated by phonons and retardation effects are fully accounted for. BCS theory is often viewed as the weak-coupling limit of Eliashberg theory, in spite of a handful of papers that have pointed out that this is not so. Here, we present very accurate numerical solutions in the weak-coupling limit to complement the existing analytical results and demonstrate more convincingly the validity of this limit by extending the analytical results to first order in the coupling constant.
Author: F. Marsiglio
Institution: University of Alberta
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2883224571