Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Pseudogap in Doped Mott Insulators is the Near-neighbour Analogue of the
  Mott Gap   We show that the strong coupling physics inherent to the insulating Mott
state in 2D leads to a jump in the chemical potential upon doping and the
emergence of a pseudogap in the single particle spectrum below a characteristic
temperature. The pseudogap arises because any singly-occupied site not
immediately neighbouring a hole experiences a maximum energy barrier for
transport equal to $t^2/U$, where $t$ is the nearest-neighbour hopping integral
and $U$ the on-site repulsion. The resultant pseudogap cannot vanish before
each lattice site, on average, has at least one hole as a near neighbour. The
ubiquituity of this effect in all doped Mott insulators suggests that the
pseudogap in the cuprates has a simple origin.

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The categories of this paper are: hep-lat
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The categories of this paper are: q-bio
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The categories of this paper are: acc-phys
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The categories of this paper are: dg-ga
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The categories of this paper are: nlin
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The categories of this paper are: hep-th
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The categories of this paper are: hep-ex
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The categories of this paper are: quant-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: physics
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The categories of this paper are: nucl-ex
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The categories of this paper are: plasm-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: math
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The categories of this paper are: funct-an
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The categories of this paper are: mtrl-th