Figure 9.

Curvature function $F(k,\mathbf{M})$ near the multi-critical points. (a) Curvature function is plotted around the multi-critical point ‘b’ in the phase diagram, which distinguish between the distinct gapless phases (CP-1 and CP-2) on the critical line ${\lambda }_2=\mu -{\lambda }_1$. (b) Curvature function is plotted around the multi-critical point ‘a’ in the phase diagram. Both are plotted for several values of ${\lambda }_1$ at $\mu =1$.