Magnon bound states versus anyonic Majorana excitations in the Kitaev honeycomb magnet α-RuCl3

Abstract

α-RuCl3 has properties consistent with predictions of a phase hosting fractionalized Majorana fermions but that could also be explained by conventional magnetic excitations. Here the authors find evidence for fractionalized quasiparticles by studying magnetic excitations across the field-temperature phase diagram.