Quasiparticle Tunnelling and Field-Dependent Critical Current in 2212-BSCCO

Details Quasiparticle Tunnelling and Field-Dependent Critical Current in 2212-BSCCO Quasiparticle Tunnelling and Field-Dependent Critical Current in 2212-BSCCO

2000-02-16

arxiv.org/abs/cond-mat/0002246v1

Physics

Condensed Matter

Superconductivity

4 pages, 6 figures. submitted to Proceedings of M2S-HTSC-VI

Scientific paper

10.1016/S0921-4534(00)01327-7

Intrinsic c-axis tunnelling in the superconducting state has been measured in zero and finite fields in small mesa structures fabricated on the surface of 2212-BSCCO single crystals. The temperature dependence of the zero-field critical current and quasi-particle conductance is related to microscopic d-wave models in the presence of impurity scattering. The strong field dependence of the c-axis critical current provides information on the correlation of flux pancakes across adjacent superconducting bi-layers. An instability in the IV characteristics is observed below 20K, which accounts for the apparent drop in critical current at low temperatures previously reported.

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