Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Theoretical insights into electronic nematic order, bond-charge orders,
  and plasmons in cuprate superconductors   In this article, we focus on the charge degree of freedom in cuprate
superconductors and review theoretical insights into the electronic nematic
order, bond-charge orders, and plasmons. The low-energy charge dynamics is
controlled by the spin-spin interaction J, which generates various bond-charge
ordering tendencies including the electronic nematic order. The nematic order
is driven by a d-wave Pomeranchuk instability and is pronounced in the
underdoped region as well as around van Hove filling in the hole-doped case;
the nematic tendency is weak in the electron-doped region. Nematicity
consistent with the d-wave Pomeranchuk instability was reported for hole-doped
cuprates in various experiments. Although the t-J and Hubbard models correctly
predicted the proximity to the nematic instability in cuprates far before the
experimental indications were obtained, full understanding of the charge
ordering tendencies in hole-doped cuprates still requires further theoretical
studies. In electron-doped cuprates, on the other hand, the d-wave bond-charge
excitations around momentum q=(0.5pi,0) explain the resonant x-ray scattering
data very well. Plasmon excitations are also present and the agreement between
the large-N theory of the t-J model and resonant inelastic x-ray scattering
measurements is nearly quantitative in both hole- and electron-doped cuprates.
Theoretically the charge dynamics in cuprates is summarized as a dual structure
in energy space: the low-energy region scaled by J, where the nematic and
various bond-charge orders are relevant, and the high-energy region typically
larger than J, where plasmons are predominant.

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The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
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The categories of this paper are: q-fin
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The categories of this paper are: solv-int
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The categories of this paper are: hep-ex
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-lat
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The categories of this paper are: nlin
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The categories of this paper are: eess
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The categories of this paper are: chem-ph
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The categories of this paper are: q-bio
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The categories of this paper are: supr-con
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The categories of this paper are: stat
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The categories of this paper are: chao-dyn
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The categories of this paper are: quant-ph
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The categories of this paper are: atom-ph