Weak versus Strong Coupling Theory for Bi2Sr2CaCu2O8
Marvin Cohen, David R. Penn
The latest optical determination of the superconducting-gap function for Bi2Sr2CaCu2O8 is consistent with weak-coupling theory. In contrast, a large discontinuity in heat-capacity data suggests strong-coupling superconductivity, and appears to exceed the theoretical strong-coupling limit. A possible resolution to the apparent incompatibility of the two measurements is presented. The apparent disagreement with the results of strong-coupling theory is also resolved.
Physical Review B (Condensed Matter and Materials Physics)
and Penn, D.
Weak versus Strong Coupling Theory for Bi<sub>2</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>8</sub>, Physical Review B (Condensed Matter and Materials Physics)
(Accessed June 4, 2023)