Doping dependence of phase coherence between superconducting Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ grains

G. C. Kim, M. Cheon, Y. C. Kim

In the present work, we report the new findings on the doping level dependence of the phase coherence between superconducting Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ (Bi-2212) grains. The ex…