Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superballistic electron flow through a point contact in a Ga[Al]As
  heterostructure   We measure electronic transport through point contacts in the high-mobility
electron gas in a Ga[Al]As heterostructure at different temperatures and bulk
electron densities. The conductance through all point contacts increases with
increasing temperature in a temperature window around $T \sim 10 K$ for all
investigated electron densities and point contact widths. For high electron
densities this conductance exceeds the fundamental ballistic limit (Sharvin
limit). These observations are in agreement with a viscous electron transport
model and previous experiments in graphene.

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The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc