Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Persistence of magnetic excitations in La2-xSrxCuO4 from the undoped
  insulator to the heavily overdoped non-superconducting metal   One of the most intensely studied scenarios of high-temperature
superconductivity (HTS) postulates pairing by exchange of magnetic excitations
[1]. Indeed, such excitations have been observed up to around optimal doping in
the cuprates [2-7]. In the heavily overdoped regime neutron scattering
measurements indicate that magnetic excitations have effectively disappeared
[8-10], and this was argued to cause the demise of HTS with overdoping [1, 8,
10]. Here we use resonant inelastic x-ray scattering (RIXS), which is sensitive
to complementary parts of reciprocal space, to measure the evolution of the
magnetic excitations in La2-xSrxCuO4 across the entire phase diagram, from a
strongly correlated insulator (x = 0) to a non-superconducting metal (x =
0.40). For x = 0, well-defined magnon excitations are observed [11]. These
magnons broaden with doping, but they persist with a similar dispersion and
comparable intensity all the way to the non-superconducting, heavily overdoped
metallic phase. The destruction of HTS with overdoping is therefore caused
neither by the general disappearance nor by the overall softening of magnetic
excitations; other factor(s), such as the redistribution of spectral weight,
must be considered.

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The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
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The categories of this paper are: ao-sci
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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: dg-ga
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The categories of this paper are: math-ph
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The categories of this paper are: eess
8
The categories of this paper are: hep-ex
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The categories of this paper are: astro-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: adap-org
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The categories of this paper are: hep-th
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The categories of this paper are: stat
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The categories of this paper are: funct-an