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
  Delafossite of CuAlO_2, AgAlO_2 and AuAlO_2   We have performed the first-principles calculations about the superconducting
transition temperature T_c of hole-doped delafossite CuAlO_2, AgAlO_2 and
AuAlO_2. Calculated T_c are about 50 K(CuAlO_2), 40 K(AgAlO_2) and 3 K(AuAlO_2)
at maximum in the optimum hole-doping concentration. The low T_c of AuAlO_2 is
attributed to the weak electron-phonon interaction caused by the low covalency
and heavy atomic mass.

35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
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The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
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The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th