Effect of photodoping on the fiske resonances of YBa2Cu3Ox grain boundary Josephson junctions

M. G. Medici; J. Elly; M. Razani; A. Gilabert; F. Schmidl; P. Seidel; A. Hoffmann; Ivan K. Schuller

doi:10.1023/A:1022671615180

Effect of photodoping on the fiske resonances of YBa₂Cu₃O_x grain boundary Josephson junctions

M. G. Medici, J. Elly, M. Razani, A. Gilabert, F. Schmidl, P. Seidel, A. Hoffmann, Ivan K. Schuller

Research output: Contribution to journal › Article › peer-review

Abstract

We have expanded our studies on illuminated YBa₂Cu₃O_x; grain boundary Josephson junctions (GBJJ) which show both dc Josephson properties (Fraunhofer pattern) and ac Josephson properties (Fiske resonance). Illuminating GBJJs with visible light changes the Josephson coupling. This change is characterized by an increase of the critical current and a large shift in the voltage position of the Fiske resonances. This effect is due to persistent photoinduced superconductivity (PPS) of the oxygen-depleted YBa₂Cu₃O_x barrier, similar to the PPS found in illuminated oxygen-deficient YBa₂Cu₃O_x thin films. From Fiske resonance experiments in GBJJs of different lengths, it is possible to study the velocity of the electromagnetic wave in the barrier and its change after illumination. Information on the parameters of the barrier, before and after illumination, is obtained from this study.

Original language	English (US)
Pages (from-to)	225-230
Number of pages	6
Journal	Journal of Superconductivity
Volume	11
Issue number	2
DOIs	https://doi.org/10.1023/A:1022671615180
State	Published - 1998
Externally published	Yes

Keywords

High-T superconductors
Josephson effects
Photoconductivity

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Physics and Astronomy (miscellaneous)

Online availability

10.1023/A:1022671615180

Library availability

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Cite this

@article{7271058abb63450ea55e41589089d9ac,

title = "Effect of photodoping on the fiske resonances of YBa2Cu3Ox grain boundary Josephson junctions",

abstract = "We have expanded our studies on illuminated YBa2Cu3Ox; grain boundary Josephson junctions (GBJJ) which show both dc Josephson properties (Fraunhofer pattern) and ac Josephson properties (Fiske resonance). Illuminating GBJJs with visible light changes the Josephson coupling. This change is characterized by an increase of the critical current and a large shift in the voltage position of the Fiske resonances. This effect is due to persistent photoinduced superconductivity (PPS) of the oxygen-depleted YBa2Cu3Ox barrier, similar to the PPS found in illuminated oxygen-deficient YBa2Cu3Ox thin films. From Fiske resonance experiments in GBJJs of different lengths, it is possible to study the velocity of the electromagnetic wave in the barrier and its change after illumination. Information on the parameters of the barrier, before and after illumination, is obtained from this study.",

keywords = "High-T superconductors, Josephson effects, Photoconductivity",

author = "Medici, {M. G.} and J. Elly and M. Razani and A. Gilabert and F. Schmidl and P. Seidel and A. Hoffmann and Schuller, {Ivan K.}",

note = "Funding Information: This work is supported by US-NSF and CNRS.",

year = "1998",

doi = "10.1023/A:1022671615180",

language = "English (US)",

volume = "11",

pages = "225--230",

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issn = "0896-1107",

publisher = "Springer",

number = "2",

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T1 - Effect of photodoping on the fiske resonances of YBa2Cu3Ox grain boundary Josephson junctions

AU - Medici, M. G.

AU - Elly, J.

AU - Razani, M.

AU - Gilabert, A.

AU - Schmidl, F.

AU - Seidel, P.

AU - Hoffmann, A.

AU - Schuller, Ivan K.

N1 - Funding Information: This work is supported by US-NSF and CNRS.

PY - 1998

Y1 - 1998

N2 - We have expanded our studies on illuminated YBa2Cu3Ox; grain boundary Josephson junctions (GBJJ) which show both dc Josephson properties (Fraunhofer pattern) and ac Josephson properties (Fiske resonance). Illuminating GBJJs with visible light changes the Josephson coupling. This change is characterized by an increase of the critical current and a large shift in the voltage position of the Fiske resonances. This effect is due to persistent photoinduced superconductivity (PPS) of the oxygen-depleted YBa2Cu3Ox barrier, similar to the PPS found in illuminated oxygen-deficient YBa2Cu3Ox thin films. From Fiske resonance experiments in GBJJs of different lengths, it is possible to study the velocity of the electromagnetic wave in the barrier and its change after illumination. Information on the parameters of the barrier, before and after illumination, is obtained from this study.

AB - We have expanded our studies on illuminated YBa2Cu3Ox; grain boundary Josephson junctions (GBJJ) which show both dc Josephson properties (Fraunhofer pattern) and ac Josephson properties (Fiske resonance). Illuminating GBJJs with visible light changes the Josephson coupling. This change is characterized by an increase of the critical current and a large shift in the voltage position of the Fiske resonances. This effect is due to persistent photoinduced superconductivity (PPS) of the oxygen-depleted YBa2Cu3Ox barrier, similar to the PPS found in illuminated oxygen-deficient YBa2Cu3Ox thin films. From Fiske resonance experiments in GBJJs of different lengths, it is possible to study the velocity of the electromagnetic wave in the barrier and its change after illumination. Information on the parameters of the barrier, before and after illumination, is obtained from this study.

KW - High-T superconductors

KW - Josephson effects

KW - Photoconductivity

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