Strongly anisotropic s-wave vs d-wave gap in cuprate superconductors: Evidence and theory

摘要

As is well known, the d-wave gap scenario for cuprate superconductors has strong support from several lines of evidence: (1) evidence for strong gap anisotropy, e.g. the Stanford photoemission data; (2) evidence for gap nodes, e.g. the UBC studies of penetration depth (lambda)(sub L)(T) at low T(