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Comprehensive Eliashberg analysis of microwave conductivity and penetration depth of K-, Co-, and P-substituted <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi mathvariant="normal">BaFe</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">As</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>
We report on the combined experimental and theoretical analysis of the microwave-frequency electromagnetic response of ${\mathrm{BaFe}}_{2}{\mathrm{As}}_{2}$ single crystals with different substitutions: K in the Ba site (hole doping), Co in the Fe site (electron doping), and P in the As site (isovalent substitution). Measurements using a coplanar resonator technique lead …