Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Current-induced nonuniform enhancement of sheet resistance in Ar+
  irradiated SrTiO3   The sheet resistance Rs of Ar+ irradiated SrTiO3 in patterns with a length
scale of several microns increases significantly below 40 K in connection with
driving currents exceeding a certain threshold. The initial lower Rs is
recovered upon warming with accelerated recovery around 70 and 160 K. Scanning
superconducting quantum interference device microscopy shows local irreversible
changes in the spatial distribution of the current with a length scale of
several microns. We attribute the observed nonuniform enhancement of Rs to the
attraction of the charged single-oxygen and dioxygen vacancies by the
crystallographic domain boundaries in SrTiO3. The boundaries, which are nearly
ferroelectric below 40 K, are polarized by the local electrical field
associated with the driven current and the clustered vacancies which suppress
conductivity in their vicinity and yield a noticeable enhancement in the device
resistance when the current path width is on the order of the boundary
extension. The temperatures of accelerated conductivity recovery are associated
with the energy barriers for the diffusion of the two types of vacancies.

11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
29
The categories of this paper are: funct-an
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The categories of this paper are: econ
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
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The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th