Effect of light irradiation on Fiske resonances and the Josephson effect in high-T{sub c} junctions

Journal Article · Wed Oct 01 00:00:00 EDT 1997 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.56.R8507· OSTI ID:632653

Elly, J; Medici, M G; Gilabert, A ^[1]; Schmidl, F; Seidel, P ^[2]; Hoffmann, A; Schuller, I K ^[3]

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1. L.P.M.C. URA CNRS 190, Universite de Nice Sophia Antipolis, Parc Valrose, 06108 Nice, Cedex 02 (France)
2. Institut fuer Festkoerperphysik, Friedrich-Schiller-Universitaet Jena, Helmholtzweg 5, D-07743 Jena (Germany)
3. Physics Department, University of California--San Diego, La Jolla, California 92093-0319 (United States)

We have performed photoexcitation experiments in high T{sub c} YBa{sub 2}Cu{sub 3}O{sub x} grain-boundary Josephson junctions. While the Josephson critical current is substantially enhanced, the normal state resistance decreases, and the positions of the extreme in the Fraunhofer diffraction pattern remain unchanged. These measurements show that the magnetic field penetration depth is not affected by light irradiation. On the other hand, the position and intensity of Fiske steps due to electromagnetic resonances increase substantially, which implies that the ratio of the thickness barrier to the dielectric constant changes by a factor of 2. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 632653
• Journal Information: Physical Review, B: Condensed Matter, Vol. 56, Issue 14; Other Information: PBD: Oct 1997
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
YTTRIUM OXIDES
JOSEPHSON EFFECT
PHYSICAL RADIATION EFFECTS
BARIUM OXIDES
COPPER OXIDES
HIGH-TC SUPERCONDUCTORS
PHOTON COLLISIONS
PENETRATION DEPTH
PHOTOCONDUCTIVITY
CRITICAL CURRENT