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We present a general method to identify topological materials by studying thelocal electronic density $\delta \rho \left(\boldsymbol{r}\right)$. Morespecifically, certain types of defects or spatial textures such as vacancies,turn graphene into a topological material characterised by invariant Chern orwinding numbers. We show that these numbers are directly accessible from adislocation pattern of $\delta \rho \left(\boldsymbol{r}\right)$, resultingfrom an interference effect induced by topological defects. For non topologicaldefects such as adatoms, this pattern is scrambled by Friedel oscillationsabsent in topological cases. A Kekule distortion is discussed and shown to beequivalent to a vacancy.

Wavefronts Dislocations Measure Topology in Graphene with Defects