Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electronic Structure of the Dilute Magnetic Semiconductor
  $Ga_{1-x}Mn_xP$ from Hard X-ray Photoelectron Spectroscopy and Hard X-ray
  Angle-Resolved Photoemission   We have investigated the electronic structure of the dilute magnetic
semiconductor (DMS) $Ga_{0.98}Mn_{0.02}P$ and compared it to that of an undoped
$GaP$ reference sample, using hard X-ray photoelectron spectroscopy (HXPS) and
hard X-ray angle-resolved photoemission spectroscopy (HARPES) at energies of
about 3 keV. We present experimental data, as well as theoretical calculations,
in order to understand the role of the Mn dopant in the emergence of
ferromagnetism in this material. Both core-level spectra and angle-resolved or
angle-integrated valence spectra are discussed. In particular, the HARPES
experimental data are compared to free-electron final-state model calculations
and to more accurate one-step photoemission theory. The experimental results
show differences between $Ga_{0.98}Mn_{0.02}P$ and $GaP$ in both angle-resolved
and angle-integrated valence spectra. The $Ga_{0.98}Mn_{0.02}P$ bands are
broadened due to the presence of Mn impurities that disturb the long-range
translational order of the host $GaP$ crystal. Mn-induced changes of the
electronic structure are observed over the entire valence band range, including
the presence of a distinct impurity band close to the valence-band maximum of
the DMS. These experimental results are in good agreement with the one-step
photoemission calculations, and a prior HARPES study of $Ga_{0.97}Mn_{0.03}As$
and $GaAs$ (Gray et al. Nature Materials 11, 957 (2012)), demonstrating the
strong similarity between these two materials. The Mn 2p and 3s core-level
spectra also reveal an essentially identical state in doping both $GaAs$ and
$GaP$.

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The categories of this paper are: nlin
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The categories of this paper are: acc-phys
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The categories of this paper are: funct-an
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The categories of this paper are: comp-gas
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The categories of this paper are: supr-con
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The categories of this paper are: hep-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: stat
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The categories of this paper are: adap-org
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The categories of this paper are: chao-dyn
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The categories of this paper are: nucl-ex
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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: hep-ex
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The categories of this paper are: math
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The categories of this paper are: q-alg