The superconducting (SC) state (T_\mathrm{c} = 0.3 K) of the heavy-fermion compound CeRh_2As_2, which undergoes an unusual field-induced transition to another high-field SC state, emerges from an unknown ordered state below T_\mathrm{o} = 0.55 K. While an electronic multipolar order of itinerant Ce-4f states was proposed to account for the... Show more