Interlayer Tunneling and Gap Anisotropy in High-Temperature Superconductors

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Science  16 Jul 1993:
Vol. 261, Issue 5119, pp. 337-340
DOI: 10.1126/science.261.5119.337


A quantitative analysis of a recent model of high-temperature superconductors based on an interlayer tunneling mechanism is presented. This model can account well for the observed magnitudes of the high transition temperatures in these materials and implies a gap that does not change sign, can be substantially anisotropic, and has the same symmetry as the crystal. The experimental consequences explored so far are consistent with the observations.