Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Study of the Phase Diagram and the Tc Pressure Dependence for HgBaCuO
  Superconductors   We apply a method recently derived based on the extended Hubbard Hamiltonian
and the BCS approach to obtain the superconducting critical temperature
dependence with carrier density for the HgBaCuO compounds. We show that this
procedure can be used to study pressure effect with the assumption that
pressure changes the supercondutor gap. The results reproduce well the
experimental data for the whole doping regime and the high and low pressure
dependence.

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The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
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The categories of this paper are: patt-sol
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The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
1
The categories of this paper are: cs
18
The categories of this paper are: econ
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
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The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
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The categories of this paper are: hep-ph
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The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con