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On the determination of the quasiparticle scattering rate in unconventional superconductors by microwave surface impedance
As found from numerous microwave experiments on the unconventional Fe-based superconductors, the temperature dependence of the quasiparticle scattering rate τ−1 cannot be accurately described within the framework of standard Drude module in the popular approximation of ωτ ≪ 1, where ω is the signal frequency. To account for the discrepancy, …