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Tunneling spectroscopy of heavily underdoped crystals of Bi2Sr2CaCu2O8-δ
Crystals of Bi2Sr2CaCu2O8+δ with optimal Tc=95 K have been underdoped using two different methods and the superconducting gaps have been obtained by tunneling. In some cases, three different tunneling geometries have been ...
High energy secondary peak structure in tunneling spectra (hump) as possible magnetic pseudogap
It is demonstrated that tunneling spectra in various high Tc cuprates display generic features. The principal conductance peaks in superconductor-insulator-normal metal (SIN) junctions indicate the superconducting gap in ...