  We investigate electron transport through the interface between a niobium
superconductor and the edge of a two-dimensional semimetal, realized in a 20~nm
wide HgTe quantum well. Experimentally, we observe that typical behavior of a
single Andreev contact is complicated by both a pronounced zero-bias resistance
anomaly and shallow subgap resistance oscillations with $1/n$ periodicity.
These results are demonstrated to be independent of the superconducting
material and should be regarded as specific to a 2D semimetal in a proximity
with a superconductor. We interpret these effects to originate from the
Andreev-like correlated process at the edge of a two-dimensional semimetal.
