IISER Bhopal Study Finds Unusual Time-Reversal Behaviour In A Type-I Superconductor

An Indian Institute of Science Education and Research (IISER) Bhopal study has found evidence of unusual time-reversal behaviour in a Type-I superconductor. Type-I superconductors are generally considered a simpler class of superconducting materials, while Type-II superconductors are more commonly associated with unconventional superconducting behaviour.

The finding involves the breaking of time-reversal symmetry, which means the physical behaviour of the material changes when the direction of time is mathematically reversed. Such behaviour has generally been associated with more complex superconducting systems, making its observation in a Type-I superconductor particularly notable.

The researchers describe YbSb₂ as the first known Type-I example showing this behaviour. The finding could provide a cleaner platform for studying exotic electron pairing, as well as the links between superconductivity, magnetism and topology. Researchers may also investigate whether such materials can support unusual quantum states, including Majorana modes, which are of interest in research on quantum computing.