Superconducting phase within the hidden-order state of the heavy-fermion material $\mathrm{UR}{\mathrm{u}}_2\mathrm{S}{\mathrm{i}}_2$

Chen-Hsuan Hsu, Sudip Chakravarty

An unconventional pairing mechanism in the heavy-fermion material $\mathrm{UR}{\mathrm{u}}_2\mathrm{S}{\mathrm{i}}_2$ is studied. We propose a mixed singlet-triplet $d$-density wave to be the hidden-order st…