Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetotransport study of the pressure-induced antiferromagnetic phase
  in FeSe   The resistivity $\rho$ and Hall resistivity $\rho_H$ are measured on FeSe at
pressures up to $P$ = 28.3 kbar in magnetic fields up to $B$ = 14.5 T. The
$\rho(B)$ and $\rho_H(B)$ curves are analyzed with multicarrier models to
estimate the carrier density and mobility as a function of $P$ and temperature
($ T\leqslant$ 110 K). It is shown that the pressure-induced antiferromagnetic
transition is accompanied by an abrupt reduction of the carrier density and
scattering. This indicates that the electronic structure is reconstructed
significantly by the antiferromagnetic order.

18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
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The categories of this paper are: eess
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
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The categories of this paper are: solv-int
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The categories of this paper are: adap-org
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The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin