Fig. 5: Temperature dependence of in-plane hexagonal and nematic Hc2 anisotropy.
From: Violation of emergent rotational symmetry in the hexagonal Kagome superconductor CsV3Sb5
a Temperature dependence of the sixfold hexagonal anisotropy component \({H}_{{{{{{{{\rm{c2}}}}}}}}}^{(6)}\) of Hc2 divided by \({H}_{{{{{{{{\rm{c2}}}}}}}}}^{(0)}\), the averaged value of the in-plane Hc2. Note that −1 is multiplied so that the ratio becomes positive. The red squares are from Hc2-ϕ measurements as in Fig. 3, the blue circles are obtained from the C-ϕ measurements as in Fig. 4, and the purple circles are from the each-point exact alignment method shown in Supplementary Fig. 6. The error bar represents asymptotic standard errors of sinusoidal fittings of each Hc2(ϕ) data set. Clearly, the data deviate from the expectation under preserved ERS from the ordinary GL theory, \({H}_{{{{{{{{\rm{c2}}}}}}}}}^{(6)}/{H}_{{{{{{{{\rm{c2}}}}}}}}}^{(0)}\propto {(1-T/{T}_{{{{{{{{\rm{c}}}}}}}}})}^{2}\) 13,14,15, which is plotted using a broken curve. b Temperature dependence of the twofold anisotropy component \({H}_{{{{{{{{\rm{c2}}}}}}}}}^{(2)}\) divided by \({H}_{{{{{{{{\rm{c2}}}}}}}}}^{(0)}\).
