Figure 1

Raman response calculated with the gap function proposed in Ref. 1. The best analytical approximation is given by $\Delta (\varphi )={\Delta }_0[\sin (2\varphi )+a_1\sin (6\varphi )+a_2\sin (10\varphi )]$ ($2{\Delta }_0=67\mathrm{c}{\mathrm{m}}^{\mathrm{-}\mathrm{1}}$, $a_1=0.42$, $a_2=0.17$) using the same definition of $\varphi$ as in Ref. 1. In this nomenclature, the scattering amplitudes read ${\gamma }_{B_{1g}}\propto \sin (2\varphi )$, ${\gamma }_{B_{2g}}\propto \cos (2\varphi )$, and ${\gamma }_{A_{1g}}\propto -\cos (4\varphi )$. Neither for small (a) nor for large (b) damping can the power laws, in particular, the ${\omega }^3$ dependence in $B_{1g}$ symmetry, be observed any more for $\omega <20\mathrm{c}{\mathrm{m}}^{\mathrm{-}\mathrm{1}}$ (insets).Reuse & Permissions