Weak-coupling to strong-coupling quantum criticality crossover in a Kitaev quantum spin liquid $\alpha$-RuCl${}_3$

Jae-Ho Han, Seung-Hwan Do, Kwang-Yong Choi +5

We report an unprecedented quantum criticality crossover representing two different universal scaling behaviors in a Kitaev quantum magnetic material $\alpha$-RuCl${}_3$. $\alpha$-RuCl${}_3$ pre…