Intrinsic Impurity in the High Temperature Superconductor Bi_2Sr_2CaCu_2O${}_{8+\delta }$

Bo Chen, Sutirtha Mukhopadhyay, W. P. Halperin +2

The {}^{17}O NMR spectra of Bi_2Sr_2CaCu_2O${}_{8+\delta }$ (Bi-2212) single crystals were measured in the temperature range from 4 K to 200 K and magnetic fields from 3 to 29 T, reported…