High pressure effects on the crystal structure andelectric conductivity of perovskite like (Ca/Sr)_2CuO_2Cl_2 compounds
【摘要】：The crystal structure stability as well as electric conductance of (Sr/Ca)_2CuO_2Cl_2 compound with K_2NiF_4 structure was investigated up to 31 GPa using diamond anvil technique. It seems that (Sr/Ca)_2CuO_2Cl_2 is quite stable under pressure but with obvious anisotropic compressibility. The equation of state (EOS) obtained shows relative large bulk modulus.
【基金】：National Basic Research Program of China (Grant Nos. 2005CB724402, 2006CB601002) National Natural Science Foundation of China (Grant No. 50701048)
High temperature superconductors (HTS) are a focus of study in the condensed matter physics. HTS crystal- lographically is a kind of perovskite derivation cuprate with CuO2 plane being the central configuration. High pressure is favorable to stabilizatio