Effects of nucleation at a first-order transition between two superconducting phases: Application to CeRh${}_2$As${}_2$

András L. Szabó, Mark H. Fischer, Manfred Sigrist

Recent experiments observed a phase transition within the superconducting regime of the heavy-fermion system CeRh${}_2$As${}_2$ when subjected to a $c$-axis magnetic field. This phase…