I don’t think this would be zero-loss diodes - it would probably superconduct in some x-axis while being non-superconducting in the y- and z-axis. Even then, it’s not clear to me what the conductivity is like in the non-superconducting axies.
Especially if the material happens to have photo electric properties too...
...and gain, at an incredibly fast slew rate!
I mean, we're laundry list fantasizing, right? [shrug emoji]
Well, yes. But both Silicon, Selenium and Germanium as well as all metals that are shiny are photoelectric. If this thing can form diodes that open a potential path to very high efficiency solar cells. It wouldn't be the first either:
"Origin of photovoltaic effect in superconducting YBa2Cu3O6.96 ceramics"
How would that work? A diode requires a p-n junction created by doping the substrate. It has low resistance in one direction but ideally infinite resistance in the other direction.