Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: ARPES study of orbital characters, symmetry breakings and pseudogaps in
  doped and pure Sr2IrO4   Sr2IrO4 is characterized by a large spin-orbit coupling, which gives rise to
bands with strongly entangled spin and orbital characters, called J=1/2 and
J=3/2. We use light-polarization dependent ARPES to study directly the orbital
character of these bands and fully map out their dispersion. We observe bands
in very good agreement with our cluster dynamical mean-field theory
calculations. We show that the J=1/2 band, the closest to the Fermi level Ef,
is dominated by dxz character along kx and dyz along ky. This is actually in
agreement with an isotropic J=1/2 character on average, but this large orbital
dependence in k-space was mostly overlooked before. It gives rise to strong
modulations of the ARPES intensity that we explain and carefully take into
account to compare dispersions in equivalent directions of the Brillouin zone.
Although the latter dispersions look different at first, suggesting possible
symmetry breakings, they are found essentially similar, once corrected for
these intensity variations. In particular, the pseudogap-like features close to
the $X$ point appearing in the nearly metallic 15% Rh-doped Sr2IrO4 strongly
depend on experimental conditions. We reveal that there is nevertheless an
energy scale of 30meV below which spectral weight is suppressed, independent of
the experimental conditions, which gives a reliable basis to analyze this
behavior. We suggest it is caused by disorder.

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The categories of this paper are: math-ph
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The categories of this paper are: eess
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The categories of this paper are: supr-con
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The categories of this paper are: patt-sol
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The categories of this paper are: acc-phys
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The categories of this paper are: alg-geom
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The categories of this paper are: physics
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The categories of this paper are: math
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The categories of this paper are: solv-int
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The categories of this paper are: quant-ph
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The categories of this paper are: cs
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The categories of this paper are: atom-ph
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The categories of this paper are: funct-an
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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: ao-sci