H.P. Lang, J.P. Ramseyer, et al.
Ultramicroscopy
Scanning tunneling spectroscopy on high-Tc superconductors with nonideal surfaces can generate misleading results. We demonstrate that reproducible BCS-like gap structures with sharp peaks and very flat subgap conductance on HgBa2Ca2Cu3O8+δ (Hg-1223) single crystals (Tc, onset = 110 K) are in fact due to a combination of charging effects (Coulomb staircase) and superconductivity.
H.P. Lang, J.P. Ramseyer, et al.
Ultramicroscopy
V. Scagnoli, U. Staub, et al.
Physical Review B - CMMP
M. Marezio, D.E. Cox, et al.
Solid State Communications
J. Karpinski, H. Schwer, et al.
Physica C: Superconductivity and its Applications