Superconductivity and Magnetism in Bi-Ni System: From Bulk to Heterostructures
The Bi-Ni system is studied for unconventional superconductivity driven by magnetism, time-reversal symmetry breaking, and triplet pairing. Research on bulk NiBi3 shows conventional s-wave superconductivity but complex magnetic fluctuations above the transition. Heterostructures (Bi/Ni bilayers) exhibit strong evidence of time-reversal symmetry breaking and nonreciprocal transport, suggesting a topological superconducting state influenced by proximity effects.