Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Strong particle-hole asymmetry of charge instabilities in doped Mott
  insulators   We study possible charge instabilities in doped Mott insulators by employing
the two-dimensional t-J model with a positive value of the next
nearest-neighbor hopping integral t' on a square lattice, which is applicable
to electron-doped cuprates. Although the d-wave charge density wave (flux
phase) and d-wave Pomeranchuk instability (nematic order) are dominant
instabilities for a negative t' that corresponds to hole-doped cuprates, we
find that those instabilities are strongly suppressed and become relevant only
rather close to half filling. Instead, various types of bond orders with
modulation vectors close to (pi,pi) are dominant in a moderate doping region.
Phase separation is also enhanced, but it can be suppressed substantially by
the nearest-neighbor Coulomb repulsion without affecting the aforementioned
charge instabilities.

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The categories of this paper are: q-alg
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The categories of this paper are: cmp-lg
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The categories of this paper are: nucl-th
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The categories of this paper are: quant-ph
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
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The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
16
The categories of this paper are: stat
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The categories of this paper are: solv-int
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The categories of this paper are: bayes-an
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The categories of this paper are: alg-geom
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The categories of this paper are: patt-sol
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The categories of this paper are: plasm-ph