Study of Electronic Properties of 122 Iron Pnictide Through Structural, Carrier-Doping, and Impurity-Scattering Effects

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Focusing on the characteristics of 122-type iron pnictide (FeSC), the thesis explores its crystal and electronic structures, along with the effects of carrier doping and impurity scattering. Through various measurement techniques, it highlights significant findings on magnetic fluctuations that elucidate the material's unusual electronic properties, such as superconducting gap symmetry and in-plane resistivity anisotropy. By comparing these properties with the normal phase, the research addresses and resolves longstanding controversies in the study of iron-based superconductors.