NMR and NQR studies on transition-metal arsenide superconductors LaRu2As2, KCa2Fe4As4F2, and A2Cr3As3

NMR and NQR studies on transition-metal arsenide superconductors LaRu₂As₂, KCa₂Fe₄As₄F₂, and A₂Cr₃As₃

Luo Jun^{1, ‡}, Wang Chunguang^{1, 2}, Wang Zhicheng³, Guo Qi¹, Yang Ji¹, Zhou Rui^{1, 4}, Matano K⁵, Oguchi T⁶, Ren Zhian^{1, 2}, Cao Guanghan³, Zheng Guo-Qing^{1, 2, 5, §}

Temperature dependence of 1/T₁ in KCa₂Fe₄As₄F₂. The black dashed line is a guide to the eyes, indicating a T³ variation of 1/T₁. The green dotted, purple short-dashed, blue dashed-dotted, and orange dashed curves show the fitting results of d wave, two-gap s⁺⁻ wave, d wave with impurity scattering, and two-gap s⁺⁻ wave with impurity scattering, respectively.