Single to multi quasiparticle excitations in the itinerant helical magnet CeRhIn${}_5$

C. Stock, J. A. Rodriguez-Rivera, K. Schmalzl +3

CeRhIn${}_5$ is an itinerant magnet where the Ce${}^{3+}$ spins order in a simple helical phase. We investigate the spin excitations and observe sharp spin-waves parameterized by a n…