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, §}

(a) Temperature dependence of ν_Q of the As2 site. (b) Temperature dependence of Knight shift for the two As sites. (c) Temperature dependence of 1/T₁T measured at the two NMR peaks corresponding to θ = 90° at H = 11.999 T and As2 site at H = 0 T. The olive dashed curve is a fitting by the 2D antiferromagnetic fluctuations model. The black dashed-dotted line characterizes T_c.