| Popis: |
Conventional superconductors, such as the elemental superconductors Al, Pb, Nb, and Sn, are believed to form spin singlet Cooper pairs that have s-wave orbital pairing symmetry. Among the avalanche of papers that followed the announcement of superconductivity at high temperatures in the cuprate perovskites [1, 2] were suggestions, quite early on, that these new superconductors might have unconventional pairing symmetry [3, 4, 5, 6]. Although unusual order parameter pairing symmetries had long been proposed for the heavy-Fermion superconductors [7], the suggestion of unusual pairing symmetry for the cuprates was at first met with considerable resistance. |
