Nonlinear uniaxial pressure dependence of the resistivity in Sr1−xBax Fe1.97Ni0.03As2<xref rid="cpb_27_8_087402fn1" ref-type="fn">*</xref><fn id="cpb_27_8_087402fn1"><label>*</label>Project supported by the Science Fonds from the Ministry of Science and Technology of China (Grant Nos. 2017YFA0302903, 017YFA0303103, 2016YFA0300502, and 2015CB921302), the National Natural Science Foundation of China (Grant Nos. 11674406 and 11674372), the “Strategic Priority Research Program (B)” of the Chinese Academy of Sciences (Grant Nos. XDB07020300 and XDB07020200), and the Youth Innovation Promotion Association of the Chinese Academy of Sciences.</fn>

Nonlinear uniaxial pressure dependence of the resistivity in Sr_1−xBa_x Fe_1.97Ni_0.03As₂**

Project supported by the Science Fonds from the Ministry of Science and Technology of China (Grant Nos. 2017YFA0302903, 017YFA0303103, 2016YFA0300502, and 2015CB921302), the National Natural Science Foundation of China (Grant Nos. 11674406 and 11674372), the “Strategic Priority Research Program (B)” of the Chinese Academy of Sciences (Grant Nos. XDB07020300 and XDB07020200), and the Youth Innovation Promotion Association of the Chinese Academy of Sciences.

Mao Hui-Can^{1, 2}, Gong Dong-Liang^{1, 2}, Ma Xiao-Yan^{1, 2}, Luo Hui-Qian¹, Yang Yi-Feng^{1, 2, 3}, Shan Lei^{1, 2, 3}, Li Shi-Liang^{1, 2, 3, †}

(color online) Doping dependence of (a) A, (b) B, (c) T′ − T₀, and (d) |λ|. Here |λ| = |(T′ − T₀)/A| as discussed in the main text. The dashed and dotted lines represent the crossovers from the first-order to second-order transition for the magnetic and nematic transitions, respectively.