Abstract
The temperature dependence of in-plane optical conductivity has been investigated for ${\mathrm{Ca}}_{0.86}{\mathrm{Pr}}_{0.14}{\mathrm{Fe}}_{2}{\mathrm{As}}_{2}$, which shows a structural transition from tetragonal (T) to collapsed tetragonal (cT) phase at ${T}_{cT}\ensuremath{\sim}73$ K. Upon entering the cT phase, drastic change characterized by the formation of a midinfrared peak near $3200 {\text{cm}}^{\ensuremath{-}1}$ (0.4 eV) in the optical conductivity is observed. Analysis of the spectral weight reveals reduced electron correlation after the cT phase transition. Based on the calculated band structure and simulated optical conductivity, we attribute the new feature around 0.4 eV to the formation of an interlayer As-As bond. The As-As bond strongly affects the Fe-As hybridizations and, in turn, drastically changes the ${\mathrm{Ca}}_{0.86}{\mathrm{Pr}}_{0.14}{\mathrm{Fe}}_{2}{\mathrm{As}}_{2}$ into a nonmagnetic Fermi liquid system without bulk superconductivity in the cT phase.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
