Bulk excitations in ultraclean $\alpha$-RuCl${}_3$: Quantitative evidence for Majorana dispersions in a Kitaev quantum spin liquid

Kumpei Imamura, Ryuichi Namba, Riku Ishioka +6

The spin-orbit coupled Mott insulator $\alpha$-RuCl${}_3$ has emerged as a prime candidate for realizing the Kitaev quantum spin liquid (KQSL), characterized by Majorana quasiparticles, w…