High-pressure phase diagram of Bi2Sr2CaCu2O8+delta single crystals

Article

关键词: SUPERCONDUCTING TRANSITION-TEMPERATURE;    HIGH-TC SUPERCONDUCTORS;    HYDROSTATIC-PRESSURE;    OXYGEN-CONTENT;    DEPENDENCE;    GPA;    YBA2CU3O7-Y;    ANISOTROPY;   

DOI  :  10.1103/PhysRevB.70.214502

来源: SCIE

【 摘 要 】

We have investigated the pressure dependence of the superconducting transition temperature T-c up to 18 GPa of Bi2Sr2CaCu2O8+delta single crystals ranging from the highly underdoped through the nearly optimally doped to the highly overdoped level. For all three samples studied, T-c is found to increase initially and then saturate at some critical pressure P-c, but decrease modestly with further increasing pressure. Oxygen doping has a tendency to reduce the increase of T-c and P-c. A high-pressure phase diagram between the saturated T-c and P-c is then obtained. Theoretical interpretation is given by using the competition between the hole carrier density and pairing interaction strength based on the high-pressure transport data of the resistivity and Hall coefficient in this system.

【 授权许可】

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