Investigation of the relationship betweenT c and the Coulomb interaction of copper cations from the neighboring CuO2 layers

Crystal chemical simulation of superconductors on the basis of oxide and intermetallic layers

“…Moreover, it was shown in [3] that not only the size of the A-cation but also that of the doping cations (at fixed hole concentration and lattice parameter) affected T c as well. The sensitivity of superconductivity to the distances from the CuO 2 plane to the adjacent A-cation planes (d(CuO 2 -A)) was reported in [4][5][6][7][8][9][10][11], while its sensitivity to the distances between Acations and oxygen atoms from the CuO 2 plane (d(A-O)) was found in [12]. T c of the Ln 1.9 Sr 0.1 CuO 4 superconductor was doubled (from 25 to 49 K) under the effect of strong epitaxial compression, which induced the a parameter decrease by 0.02 Å and the c parameter increase by 0.1 Å [13].…”