Surface Junction in Bi2Sr2CaCu2O8+d Single Crystals
L. X. You, P. H. Wu
Abstract
As nature junction geometry of the d-wave cuprate superconductor/insulator/the mixture of s-wave and d-wave cuprate superconductor, the upmost surface junction of intrinsic Josephson junction stack fabricated on Bi2Sr2CaCu2O8+d single crystals was measured and discussed. We successfully observed half-integral microwave induced steps as well as integral steps with resistively shunting technology, which shows the evidence of second order supercurrent, consistent with Tanaka's theory.
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