Abstract
Using Zn thin film as counterelectrode, Bi2Sr2CaCu2O8+δ tunnel junctions were prepared. Temperature-dependent tunneling spectra of these planar junctions provided measurements of energy gap, 2Δ, and transition temperature, Tc. The spectra also allowed the observation of pseudogap in normal state and showed strong evidence of d-wave symmetry of the superconducting order parameter. The present junction may find its way in the electronics applications.
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