Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Possible coexistence of double-Q magnetic order and chequerboard charge
  order in the re-entrant tetragonal phase of Ba0.76K0.24Fe2As2   We investigate the re-entrant tetragonal phase in the iron-based
superconductor Ba0 .76K0.24Fe2As2 by DC magnetization and thermoelectrical
measurements. The reversible magnetization confirms by a thermodynamic method
that the spin alignment in the re-entrant C4 phase is out-of-plane, in
agreement with an itinerant double-Q magnetic order [Allred et al., Nat. Phys.
12, 493 (2016)]. The Nernst coefficient shows the typical unusually large
negative value in the stripe-type spin density wave (SDW) state owing to the
Fermi surface reconstruction associated with SDW and nematic order. At the
transition into the re-entrant C4 tetragonal phase it hardly changes, which
could indicate that instead of a complete vanishing of the associated charge
order, the spin reorientation could trigger a redistribution of the charges to
form a secondary charge order, e.g. in form of a chequerboard-like pattern that
no longer breaks the rotational C4 symmetry.

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The categories of this paper are: solv-int
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The categories of this paper are: bayes-an
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The categories of this paper are: dg-ga
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The categories of this paper are: plasm-ph
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The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
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The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: alg-geom
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The categories of this paper are: nucl-th
3
The categories of this paper are: physics
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The categories of this paper are: hep-lat