Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Resonant inelastic X-ray scattering study of intra-band charge
  excitations in hole-doped high-Tc cuprates   We have performed resonant inelastic x-ray scattering (RIXS) near the Cu-K
edge on cuprate superconductors La(2-x)Sr(x)CuO(4), La(2-x)Ba(x)CuO(4),
La(2-x)Sr(x)Cu(1-y)Fe(y)O(4) and Bi(1.76)Pb(0.35)Sr(1.89)CuO(6+d), covering
underdoped to heavily overdoped regime and focusing on charge excitations
inside the charge-transfer gap. RIXS measurements of the 214 systems with Ei =
8.993 keV have revealed that the RIXS intensity at 1 eV energy transfer has a
minimum at (0,0) and maxima at (0.4pi, 0) and $(0, 0.4pi) for all doping points
regardless of the stripe ordered state, suggesting that the corresponding
structure is not directly related to stripe order. Measurements with Ei = 9.003
keV on metallic La(1.7)Sr(0.3)CuO(4) and Bi(1.76)Pb(0.35)Sr(1.89)CuO(6+d)
exhibit a dispersive intra-band excitation below 4 eV, similar to that observed
in the electron-doped Nd(1.85)Ce(0.15)CuO(4). This is the first observation of
a dispersive intra-band excitation in a hole doped system, evidencing that both
electron and hole doped systems have a similar dynamical charge correlation
function.

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The categories of this paper are: funct-an
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The categories of this paper are: solv-int
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The categories of this paper are: mtrl-th
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The categories of this paper are: stat
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The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
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The categories of this paper are: econ
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The categories of this paper are: hep-th
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The categories of this paper are: adap-org
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The categories of this paper are: acc-phys
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The categories of this paper are: nucl-th
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The categories of this paper are: comp-gas
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The categories of this paper are: math
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The categories of this paper are: alg-geom
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The categories of this paper are: dg-ga
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The categories of this paper are: patt-sol