Nature of Magnetic Excitations in the High-Field Phase of $\alpha$-RuCl${}_3$

A. N. Ponomaryov, L. Zviagina, J. Wosnitza +7

We present comprehensive electron spin resonance (ESR) studies of in-plane oriented single crystals of $\alpha$-RuCl${}_3$, a quasi-two-dimensional material with honeycomb structure, focu…