Large field-induced gap of Kitaev-Heisenberg paramagnons in $\alpha$-RuCl${}_3$

Richard Hentrich, Anja U. B. Wolter, Xenophon Zotos +12

The honeycomb Kitaev-Heisenberg model is a source of a quantum spin liquid with Majorana fermions and gauge flux excitations as fractional quasiparticles. In the quest of finding a…