Fig. 4: Comparison with other stress–strain and ultrasound experiments.
From: Direct evidence for the absence of coupling between shear strain and superconductivity in Sr2RuO4
Our experimental data from Fig. 2e are shown as circles, while the grey shaded region marked by the black arrows indicates our confidence interval for the lack of a kink or a quadratic strain dependence. The green solid line shows the kink required by the symmetry, with the slope estimated combining stress experiments from refs. 22,29,30 via Eq. (3). The V-shaped kinks shown by the blue and red dashed lines are estimated from the c66 ultrasound jump at Tc20,21 via the 1st order Ehrenfest relation. The dotted red line shows the quadratic slope calculated via the 2nd order Ehrenfest relation from the c66 slope change at Tc21.
