Correlation between Inhomogeneity and Superconductivity in Cuprate Bi<sub>2</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>8+</sub><sub>d </sub> at High Pressure
ORAL
Abstract
We report a discovery of the correlation between inhomogeneity and superconductivity in single-crystal Bi2Sr2CaCu2O8+d (Bi-2212) at high pressure, by using multiple synchrotron x-ray techniques. Our imaging and small-angle scattering measurements reveal a newly discovered ribbon phase as well as short-range charge ordering at nano and micron scales. We observe that both pressure and x-ray irradiation could alter the inhomogeneity, and the changes of the ribbon phase’s morphology coincide with the doom-shaped TC at high pressure. Our x-ray absorption, inelastic scattering, irradiation experiments imply that the inhomogeneity could be associated with an inhomogeneous distribution of oxygen holes. These findings provide a direct link between TC and inhomogeneity in cuprate Bi-2212 HTSC.
*DOE-BES under Award No. DE-FG02-99ER45775 and NSFC Grant No. U1530402.
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Presenters
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Yang Ding
- XSG, Center for High Pressure Science & Technology Advanced Research