Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Stress Induced Charge-Ordering Process in LiMn2O4   In this letter we report the stress induced Mn charge-ordering process in the
LiMn2O4 spinel, evidenced by the lattice strain evolutions due to the
Jahn-Teller effects. In-situ neutron diffraction, reveals that the initial
stage of this process at low stress, indicating the eg electron localization at
the preferential Mn sites during the early phase transition, as an underlying
charge ordering mechanism in the charge-frustrated LiMn2O4. The initial stage
of this transition exhibits as a progressive lattice and charge evolution,
without showing a first-order behavior.

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The categories of this paper are: patt-sol
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The categories of this paper are: atom-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: q-fin
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The categories of this paper are: alg-geom
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The categories of this paper are: plasm-ph
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The categories of this paper are: econ
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The categories of this paper are: math
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The categories of this paper are: nucl-th
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The categories of this paper are: q-bio
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The categories of this paper are: math-ph
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The categories of this paper are: q-alg
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The categories of this paper are: hep-th
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ph
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The categories of this paper are: mtrl-th