SPICE Workshop on Unconventional Superconductors and Magnets May 12th - 14th, 2026
Rafael Fernandes
Altermagnets are collinear magnetically ordered systems that are invariant under a combination of time-reversal and rotational symmetries. Intense work on this topic has revealed that altermagnetism is realized in a broad range of materials, from weakly-correlated metals to strongly-correlated Mott insulators, thus opening new avenues to explore the interplay between electronic correlations and magnetism. In this talk, I will discuss two different scenarios for the interplay between superconductivity and altermagnetism. First, I will show that altermagnetic fluctuations close to a putative quantum critical point promote pairing interactions that favor not only the expected triplet superconducting states, but also singlet states. The latter correspond to unconventional intra-unit-cell pairing in which the Cooper pairs are formed by electrons from different sublattices. Then, I will present the properties of a superconducting state developing deep inside the altermagnetic phase, highlighting its unusual triplet, multi-component character and its intertwining with other instabilities that compete with altermagnetism.