I am starting to work with the high temperature superconductor BSCCO (Bi–Sr–Ca–Cu–O). I have read that the carriers of superconducting current is hole pairs. (As opposed to electron-pairs in normal superconductors) I am trying to understand how the transport would work. If I contact it with gold and I am trying to measure the conductance, how does the interface of the metal/superconductor transport work? Normally, an electron crossing from the metal to the superconductor would carry another electron with it creating a Cooper pair. I feel like you would have some sort of junction. I think I am just confused about the physics of the transport and I don't really know what I am asking. If someone could talk about the transport and the interfaces, it would be much appreciated. Thanks.