Figure 4: Temperature evolution of BaTi2As2O structural parameters.
From: Intra-unit-cell nematic charge order in the titanium-oxypnictide family of superconductors
(a) Lattice parameter c (red). (b) Lattice parameters a, b (blue). Insets: orthorhombicity η=2 × (a–b)/(a+b) (left) and unit cell volume (right). Vertical dashed grey line indicates transition temperature. Dashed red line is a guide for the eyes. Error bars represent the estimated standard deviation of the corresponding refined parameter.
