  We present a symmetry-based scheme to create 0D second-order topological
modes in continuous 2D systems. We show that a metamaterial with a
\textit{p6m}-symmetric pattern exhibits two Dirac cones, which can be gapped in
two distinct ways by deforming the pattern. Combining the deformations in a
single system then emulates the 2D Jackiw-Rossi model of a topological vortex,
where 0D in-gap bound modes are guaranteed to exist. We exemplify our approach
with simple hexagonal, Kagome and honeycomb lattices. We furthermore formulate
a quantitative method to extract the topological properties from finite-element
simulations, which facilitates further optimization of the bound mode
characteristics. Our scheme enables the realization of second-order topology in
a wide range of experimental systems.
