Unified picture of superconductivity and magnetism in CeRh${}_2$As${}_2$

Changhee Lee, Daniel F. Agterberg, P. M. R. Brydon

We study the micorscopic origin of the multiple superconducting and magnetic phases observed in CeRh${}_2$As${}_2$. We exploit the existence of a van Hove singularity enforced by the n…