Fig. 2: Ginzburg–Landau phase diagram.
From: Correlated order at the tipping point in the kagome metal CsV3Sb5
a, Definition of the three-component order parameters \({{{\Delta }}}\) (describing real modulation of the bond hopping) and \({{{\Delta }}}^{{\prime} }\) (describing imaginary modulation of the bond hopping, meaning flux order). Both order parameters break translational symmetry and increase the unit cell by 2 × 2. In the lower panel, solid and dashed lines denote positive and negative values of the bond order parameter, respectively. b, Schematic phase diagram of the order parameters \({{{\Delta }}}\) and \({{{\Delta }}}^{{\prime} }\). From left to right, we tune the relative critical temperature of \({{{\Delta }}}\) and \({{{\Delta }}}^{{\prime} }\). Time-reversal (TR) is broken in the blue region, whereas we have TRS in the pink region. c, Order parameters along four vertical cuts through the phase diagram. \({{{\Delta }}}^{{\prime} }\) always induces a subsidiary \({{{\Delta }}}\), while the converse is not true.
