ARPES study of the Kitaev Candidate $\alpha$-RuCl$_3$

  title={ARPES study of the Kitaev Candidate \$\alpha\$-RuCl\$\_3\$},
  author={Xiaoqing Zhou and Haoxiang Li and Justin A. Waugh and Stephen Parham and Heung-Sik Kim and Jennifer A. Sears and A. Gomes and Hae Young Kee and Young-June Kim and Daniel S. Dessau},
  journal={Physical Review B},
$\alpha$-RuCl$_3$ has been hinted as a spin-orbital-assisted Mott insulator in proximity to a Kitaev spin liquid state. Here we present ARPES measurements on single crystal $\alpha$-RuCl$_3$ in both the pristine and electron-doped states, and combine them with LDA+SOC+U calculations performed for the several low-energy competing magnetically ordered states as well as the paramagnetic state. A large Mott gap is found in the measured band structure of the pristine compound that persists to more… 

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