Abstract
We have performed the first-principles calculations about the superconducting transition temperature Tc of hole-doped delafossite CuAlO2, AgAlO2 and AuAlO2. Calculated Tc are about 50K (CuAlO2), 40K (AgAlO2) and 3K(AuAlO2) at maximum in the optimum hole-doping concentration. The low Tc of AuAlO2 is attributed to the weak electron–phonon interaction caused by the low covalency and heavy atomic mass.
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