Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Andreev reflection at the edge of a two-dimentional semimetal   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.

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The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
13
The categories of this paper are: quant-ph
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The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
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The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
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The categories of this paper are: hep-th
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The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
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The categories of this paper are: math
11
The categories of this paper are: hep-lat