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

Abstract

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.

4 pages, 6 figures

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Cited by in corpus (19)

• Two pressure-induced transitions in TiOCl: Mott insulator to anisotropic metal
• Deconfinement transition and dimensional crossover in the Bechgaard-Fabre salts: pressure- and temperature-dependent optical investigations
• Enhanced dimerization of TiOCl under pressure: spin-Peierls - to - Peierls transition
• Symmetry disquisition on the TiOX phase diagram
• Mott-Hubbard gap closure and structural phase transition in the oxyhalides TiOBr and TiOCl under pressure
• Microscopic model for transitions from Mott to spin-Peierls insulator in TiOCl
• Pressure-induced metallization and structural phase transition of the Mott-Hubbard insulator TiOBr
• Photoemission of a doped Mott insulator: spectral weight transfer and qualitative Mott-Hubbard description
• Pressure dependence of the Verwey transition in magnetite: an infrared spectroscopic point of view
• Momentum-resolved single-particle spectral function for TiOCl from a combination of density functional and variational cluster calculations
• Lattice and orbital fluctuations in TiPO4
• Suppression of the Charge-Density-Wave State in Sr${}_{10}$Ca${}_4$Cu${}_{24}$O${}_{41}$ by External Pressure
• Two pressure-induced structural phase transitions in TiOCl
• Polarization-dependent infrared reflectivity study of Sr${}_{2.5}$Ca${}_{11.5}$Cu${}_{24}$O${}_{41}$ under pressure: Charge dynamics, charge distribution, and anisotropy
• High pressure x-ray study of spin-Peierls physics in the quantum spin chain material TiOCl
• Pressure-driven phase transitions in correlated systems
• Novel electronic states close to Mott transition in low-dimensional and frustrated systems
• Pressure-induced Spin-Peierls to Incommensurate Charge-Density-Wave Transition in the Ground State of TiOCl
• Study of the pressure effects in TiOCl by ab initio calculations