Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chemical Trend of Superconducting Transition Temperature in Hole-doped
  CuBO$_2$, CuAlO$_2$, CuGaO$_2$ and CuInO$_2$   We calculated the superconducting transition temperature $T_{\rm c}$ of
hole-doped CuBO$_2$, CuAlO$_2$, CuGaO$_2$ and CuInO$_2$ using first-principles.
The calculated $T_{\rm c}$ are about 50 K for CuAlO$_2$, 10 K for CuBO$_2$ and
CuGaO$_2$ and 1 K for CuInO$_2$ at maximum in the optimum hole-doping
concentration. The low $T_{\rm c}$ of CuInO$_2$ is attributed to the weak
electron-phonon interaction caused by the low covalency and heavy atomic mass.

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The categories of this paper are: cs
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-ex
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The categories of this paper are: acc-phys
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The categories of this paper are: cmp-lg
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The categories of this paper are: nlin
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The categories of this paper are: physics
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The categories of this paper are: q-alg
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The categories of this paper are: nucl-th
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The categories of this paper are: econ
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The categories of this paper are: dg-ga
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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-th
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The categories of this paper are: stat
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The categories of this paper are: math-ph