Radaelli P G, Perroux M, Marezio M, de Brion S, Tholence J L, Huang Q, Santoro A
Science. 1994 Jul 15;265(5170):380-3. doi: 10.1126/science.265.5170.380.
A cuprate superconductor containing double mercury layers was synthesized with a high-pressure, high-temperature technique. The compound, with chemical formula Hg(2)Ba(2)-Y1-xCaxCu(2)O(8-delta), contains a double HgO layer with structure similar to that of rock salt. The prototype compound Hg(2)Ba(2)YCu(2)O(8-delta) is an insulator. Superconductivity is induced in the system by partially replacing yttrium with calcium.
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