Type I superconductor appears to break time-reversal symmetry

ScienceAlert reports that physicists led by IISER Bhopal found tiny internal magnetic fields appearing in ytterbium diantimonide (YbSb2) as it becomes superconducting, evidence of time-reversal symmetry breaking. The team describes unusual electron pairing, while models suggest the material’s surface may host Majorana modes that could prove useful for quantum computing.