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

I. F. G. Parker; M. Endres; P. J. Thomas; G. Yang; A. Yurgens; C. E. Gough

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

I. F. G. Parker·M. Endres·P. J. Thomas·G. Yang·A. Yurgens·C. E. Gough

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Abstract

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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I. F. G. Parker, M. Endres, P. J. Thomas, G. Yang, A. Yurgens, C. E. Gough. 1998-09-24. Emergence of superconducting gap features in Bi2Sr2CaCu2O8+delta single crystals from intrinsic c-axis interlayer tunneling. https://arxiv.org/abs/cond-mat/9809328

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