Optical study of the metal-insulator transition in CuIr 2 S 4 crystals

@article{Wang2004OpticalSO,
  title={Optical study of the metal-insulator transition in CuIr 2 S 4 crystals},
  author={Nl Wang and G. Cao and P. Zheng and G. Li and Zhong Fang and Tao Xiang and Hideaki Kitazawa and T. Matsumoto},
  journal={Physical Review B},
  year={2004},
  volume={69},
  pages={153104}
}
We present measurements of the optical spectra on single crystals of spinel-type compound ${\mathrm{CuIr}}_{2}{\mathrm{S}}_{4}.$ This material undergoes a sharp metal-insulator transition at 230 K. Upon entering the insulating state, the optical conductivity shows an abrupt spectral weight transfer and an optical excitation gap opens. In the metallic phase, Drude components in low frequencies and an interband transition peak at $\ensuremath{\sim}2\mathrm{eV}$ are observed. In the insulating… 
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TLDR
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