Electrodynamics of BaFe2As2 from infrared measurements under pressure

Abstract

We report on an infrared study on the undoped compound BaFe2As2 as a function of both pressure (up to about 10 GPa) at three temperatures (300, 160, and 110 K). The evolution with pressure and temperature of the optical conductivity shows that, by increasing pressure, the mid-infrared absorptions associated with magnetic order are lowered while the Drude term increases, indicating the evolution towards a conventional metallic state. We evaluate the spectral weight dependence on pressure comparing it to that previously found upon doping. The whole optical results indicate that lattice modifications can not be recognized as the only parameter determining the low-energy electrodynamics in these compounds.

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Cited by in corpus (6)

• Electronic correlation assisted ferroelectric metallic state in LiOsO${}_3$
• Optical properties of V2O3 in its whole phase diagram
• Pressure Suppression of Electron Correlation in the Collapsed Tetragonal Phase of $CaF{e}_{2}A{s}_2$ : A DFT-DMFT Investigation
• Transmittance and reflectance measurements at terahertz frequencies on a superconducting BaFe_{1.84}Co_{0.16}As_2 ultrathin film: an analysis of the optical gaps in the Co-doped BaFe_2As_2 pnictide
• Optical Study of BaFe${}_2$As${}_2$ under pressure: Coexistence of spin-density-wave gap and superconductivity
• Electrodynamics of superconducting pnictide superlattices