Evidence of chiral fermion edge modes through geometric engineering of thermal Hall in $\alpha$-RuCl${}_3$

Heda Zhang, Gabor B. Halasz, Sujoy Ghosh +5

The experimental observation of half-integer-quantized thermal Hall conductivity in the Kitaev candidate material $\alpha$-RuCl${}_3$ has served as smoking-gun signature of non-Abelian an…