Emergence of superconducting gap features in Bi2Sr2CaCu2O8+delta single crystals from intrinsic c-axis interlayer tunneling

Details Emergence of superconducting gap features in Bi2Sr2CaCu2O8+delta single crystals from intrinsic c-axis interlayer tunneling Emergence of superconducting gap features in Bi2Sr2CaCu2O8+delta single crystals from intrinsic c-axis interlayer tunneling

1998-09-24

arxiv.org/abs/cond-mat/9809328v1

Physics

Condensed Matter

Superconductivity

11 pages, 4 gifs

Scientific paper

Static and dynamic transport measurements on stacks of intrinsic Josephson junctions on Bi2Sr2CaCu2O8+delta single crystals, near to optimal doping, are presented. The zero bias minimum in dynamic conductance is consistent with a normal state pseudo-gap. At Tc, a critical current develops simultaneously with new features consistent with a gap in the superconducting density states at an already well-established energy. The lack of thermal broadening and the small scale of the features force us to conclude a high degree of coherent interlayer tunneling in both the superconducting and normal states.

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