2020/12/23 by Luxmi Rani, Rani, Luxmi, Cem Sevik +1
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Iron-based superconductors research #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #Strongly Correlated Electrons (cond-mat.str-el) #Superconductivity (cond-mat.supr-con) #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.2012.12650
12pages, 4 figures
arxiv created 2020/12/23 · openalex publication_date 2020/12/23 · arxiv updated 2020/12/24 · openalex created_date 2022/07/25 · openalex updated_date 2026/07/28
This study leads to the investigation of the non-equilibrium electron relaxation in the normal state of iron pnictides. Here we consider the relaxation of electrons due to their coupling with magnons and phonons in the metallic state of iron pnictides using the memory function approach. In the present model, electrons live at a higher temperature than that of the phonon and magnon baths, mimicking a non-equilibrium steady state situation. Further we analyze theoretically the generalized Drude scattering rate within the framework of Two Temperature Model and study the full frequency and temperature behavior for it. In zero frequency regime, the rate of electron-magnon scattering and electron-phonon scattering shows a linear temperature dependence at higher temperature values greater than Bloch-Grüneisen temperature. Whereas at lower temperature values, T≪ΘBG, corresponding scattering rates follow the temperature behavior as (1/τe-p \varpropto T3) and (1/τe-m \varpropto T3/2), respectively. In the AC regime, we compute that 1/τ∝ ω2 for ω≪ωBG and for the values greater than the Bloch-Grüneisen frequency, it is ω-independent. Also, in lower frequency and zero temperature limit, we have observed the different frequency scale of electron-magnon and electron-phonon scattering i.e (1/τ∝ ω3/2) and (1/τ∝ ω3). These results can be viewed with the pump-probe experimental setting for the normal state of iron pnictides.