THE SYNTHESIS OF INFINITE-LAYER CaCuO2 AND HYPOTHETICAL p-TYPE DOPING WITH Na UNDER HIGH-PRESSURE
2005
The CaCuO2 with infinite-layer structure (IL CaCuO2) was synthesized under high-pressure. The p-type doped infinite layer compounds Ca1-xNaxCuO2 with the different carriers concentration (x=0.05, 0.1) were also prepared from high temperature and high-pressure technique. The lattice parameter a decreases with increasing Na content x in the p-type doped Ca1-xNaxCuO2, suggesting that the hole like carriers enter into the CuO2 plane, and Na is successfully doped into the infinite-layer CaCuO2. This was confirmed by the systematic evolution of resistance with increasing the doping level. However, no superconductivity was observed in the samples.
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