Temperature and field dependence of the intrinsic tunnelling structure in overdoped Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$

T. M. Benseman, J. R. Cooper, G. Balakrishnan

We report intrinsic tunnelling data for mesa structures fabricated on three over- and optimally-doped $\mathrm{B}{\mathrm{i}}_{2.15}\mathrm{S}{\mathrm{r}}_{1.85}\mathrm{CaC}{\mathrm{u}}_2{\mathrm{O}}_{8+\delta }$ crystals with transition temperatures…