Superconducting gap in BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$ from temperature dependent transient optical reflectivity

Abstract

Temperature and fluence dependence of the 1.55-eV optical transient reflectivity in BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$ was measured and analysed in the low and high excitation density limit. The effective magnitude of the superconducting gap of $\sim 5$ meV obtained from the low-fluence-data bottleneck model fit is consistent with the ARPES results for the $\gamma$-hole Fermi surface. The superconducting-state nonthermal optical destruction energy was determined from the fluence dependent data. The in-plane optical destruction energy scales well with T${}_{\mathrm{c}}^2$ and is found to be similar in a number of different layered superconductors.

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Cited by in corpus (1)

• Study of pseudogap and superconducting quasiparticle dynamics in $\mathrm{B}{\mathrm{i}}_2\mathrm{S}{\mathrm{r}}_2\mathrm{CaC}{\mathrm{u}}_2{\mathrm{O}}_{8+\delta }$ by time-resolved optical reflectivity