On the possibility of Universal Ratios within a van Hove scenario of BCS theory
David Quesada, C. Trallero‐Giner, R. Baquero · AIP conference proceedings · 1996
The central results of the BCS theory are the Universal Ratios (UR) which do not depend on any physical parameters whatsoever. This constitutes a well defined weak coupling limit for conventional superconductivity (CS). Furthermore, this formalism assumes that there is a bosonic mechanism acting between electrons, but no explicit hypothesis about the atracting mechanism is necessary. The UR constitute an important point of reference and characterization for CS. Here a generalization of the BCS theory for the van Hove scenario for high‐Tc superconductivity is performed.