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.
Citation: Physical Review B (Condensed Matter and Materials Physics)
Pub Type: Journals