Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Stability of charge-stripe ordered La2-xSrxNiO4+delta at one third
  doping   The stability of charge ordered phases is doping dependent, with different
materials having particularly stable ordered phases. In the half filled charge
ordered phases of the cuprates this occurs at one eighth doping, whereas in
charge-stripe ordered La2-xSrxNiO4+delta there is enhanced stability at one
third doping. In this paper we discuss the known details of the charge-stripe
order in La2-xSrxNiO4+delta, and how these properties lead to the one third
doping stability.

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The categories of this paper are: math
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The categories of this paper are: econ
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
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The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
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The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th