It is, in my opinion, still "electrons". More pedantically, the electron field is still the mechanism for nonzero current, regardless of its exotic state. This

It is, in my opinion, still "electrons". More pedantically, the electron field is still the mechanism for nonzero current, regardless of its exotic state. This must be the case as there's no other stable charge-carrying field that's not strongly localised to the nucleii (in this material, or any solid material I can think of). The article does a lot of waffling without admitting this basic point.