Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Is stripe incommensurability in La_{2-x}Sr_xCoO_4 proportional to
  doping?   The longstanding notion of stripe incommensurability being proportional to
doping, \delta(x) ~ x, in lanthanum transition-metal oxides, La_{2-x}Sr_xTmO_4
(Tm = Cu, Ni, Co), is partly borne out by experiment but also plagued with
exceptions. Future neutron-scattering experiments on cobaltates could provide a
clear distinction whether a linear or square-root dependence, \delta(x) ~
sqrt(x - x_0), is valid.

14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
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The categories of this paper are: dg-ga
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th