c-Axis Conductivity and Intrinsic Josephson Effects in YBa2Cu3O7−δ

M. Rapp; A. Murk; R. Semerad; W. Prusseit

doi:10.1103/PhysRevLett.77.928

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c-Axis Conductivity and Intrinsic Josephson Effects in YBa2Cu3O7−δ

M. Rapp, A. Murk, R. Semerad, W. Prusseit

DOI 10.1103/PhysRevLett.77.928 · Physical Review Letters

T1

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Abstract

We have observed intrinsic Josephson coupling between CuO2 double layers of YBa2Cu3O7−δ by direct detection of ac and dc Josephson effects. The crucial points were a reduction of the junction size to the 1–2μm range and a weakening of the interlayer coupling via oxygen depletion of the CuO chains. As a result we obtained distinct signatures in the I−V characteristics and 11 GHz microwave emission caused by ac Josephson currents. The temperature dependence of the critical current supports the idea of a superconductor-insulator-superconductor interlayer tunneling mechanism.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	57	Pressure not reported	unknown
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	83	Pressure not reported	unknown
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Tl2Ba2Ca2Cu3O10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown