Exotic charge-spin coupling is expected in the Kitaev spin liquid. Here, the authors report unconventional charge order and Mott-Hubbard to charge transfer insulator transition in layered α-RuCl3 in proximity to graphite, indicating the internal coupling between charge, spin and orbital degrees of freedom.
- Xiaohu Zheng
- Zheng-Xin Liu
- Rui-Rui Du
