Fig. 1: Spin configurations and elastoresistivity configurations.
From: Nematic fluctuations in an orbital selective superconductor Fe1+yTe1−xSex
a, b Schematic spin configurations of the (a) single-stripe phase, with Q = (π, π), and (b) double-stripe phase, with wave-vector Q = (π, 0). c, d Schematic diagrams of the Montgomery method for the elastoresistivity measurement in c B2g and d B1g configuration. e, f The anisotropic resistivity (ρxx−ρyy) as a function of anisotropic strain (ϵxx−ϵyy) for annealed Fe1+yTe1−xSex (0 ≤ x ≤ 0.53) at T = 20 K in e B2g and f B1g channels. The B1g elastoresistivity coefficient m11−m12 and B2g elastoresistivity coefficient 2m66 can be obtained by fitting the linear slope of resistivity versus strain. The samples with high doping concentrations (x = 0.38, 0.45, 0.53) show predominantly a B2g response while the low doping ones (x = 0, 0.12) show comparable B1g and B2g responses.
