Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measured potential profile in a quantum anomalous Hall system suggests
  bulk-dominated current flow   Ideally, quantum anomalous Hall systems should display zero longitudinal
resistance. Yet in experimental quantum anomalous Hall systems elevated
temperature can make the longitudinal resistance finite, indicating dissipative
flow of electrons. Here, we show that the measured potentials at multiple
locations within a device are well-described by solution of the Poisson
equation, assuming a spatially-uniform ratio between longitudinal and
transverse conductivity. Extrapolation suggests that at even lower temperatures
current may still flow primarily through the two-dimensional bulk rather than,
as had been assumed, through edge modes. An argument for bulk current flow
previously applied to quantum Hall systems supports this picture.

29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
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The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol