Microwave-induced constant voltage steps in surface junctions of Bi_{2}Sr_{2}CaCu_{2}O_{8+δ} single crystals

Details Microwave-induced constant voltage steps in surface junctions of Bi_{2}Sr_{2}CaCu_{2}O_{8+δ} single crystals Microwave-induced constant voltage steps in surface junctions of Bi_{2}Sr_{2}CaCu_{2}O_{8+δ} single crystals

1999-08-31

arxiv.org/abs/cond-mat/9908459v1

Physics

Condensed Matter

Superconductivity

8 pages, 4 figures, submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.61.R3834

We have observed the zero-crossing steps in a surface junction of a mesa structure micro-fabricated on the surface of a Bi-2212 single crystal. With the application of microwave of frequencies 76 and 94 GHz, the current-voltage characteristics show clear voltage steps satisfying the ac Josephson relation. Increasing the microwave power, the heights of the steps show the Bessel-function behavior up to step number n=4. We confirm that the intrinsic surface junction meets the criterion for the observation of zero-crossing steps.

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