Material with zero DC electrical resistance and complete Meissner-effect expulsion of magnetic flux below a critical temperature T_c. Conventional (phonon-mediated, BCS) and unconventional (cuprate, Fe-pnictide, H₃S hydride) families.
Material with zero DC electrical resistance and complete Meissner-effect expulsion of magnetic flux below a critical temperature T_c. Conventional (phonon-mediated, BCS) and unconventional (cuprate, Fe-pnictide, H₃S hydride) families.