Pressure-induced insulator-to-metal transition in low-dimensional TiOCl

Details Pressure-induced insulator-to-metal transition in low-dimensional TiOCl Pressure-induced insulator-to-metal transition in low-dimensional TiOCl

2006-03-14

arxiv.org/abs/cond-mat/0603376v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 6 figures

Scientific paper

10.1103/PhysRevB.74.184402

We studied the transmittance and reflectance of the low-dimensional Mott-Hubbard insulator TiOCl in the infrared and visible frequency range as a function of pressure. The strong suppression of the transmittance and the abrupt increase of the near-infrared reflectance above 12 GPa suggest a pressure-induced insulator-to-metal transition. The pressure-dependent frequency shifts of the orbital excitations, as well as the pressure dependences of the charge gap and the spectral weight of the optical conductivity above the phase transition are presented.

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