Studies of static and dynamic properties of multilayered (stacked) Josephson junctions

Shenian N. Song; Stevan R. Maglic; Christopher D. Thomas; Edward D. Rippert; P. R. Auvil; Melville P Ulmer; John B Ketterson

doi:10.1117/12.250263

Studies of static and dynamic properties of multilayered (stacked) Josephson junctions

Shenian N. Song, Stevan R. Maglic, Christopher D. Thomas, Edward D. Rippert, P. R. Auvil, Melville P Ulmer, John B Ketterson

Physics and Astronomy

Research output: Contribution to journal › Conference article › peer-review

Abstract

We have studied the static I-V characteristics and vortex dynamics in stacked Nb/AlO_x/Nb Josephson junctions. In josephson junction stacks consisting of two junctions having identical maximum Josephson supercurrent I_c,I_c versus H characteristics deviating from the Fraunhofer pattern have been observed, implying that a structural phase transformation to a triangular vortex lattice occurs with increasing H. Interjunction coupling leads to splitting of the Swihart mode; which manifest itself as Fisk steps with different voltage spacings. When subjected to microwave radiation, the I-V curves of the stacked Josephson junctions exhibit new features which are absent in single junctions.

Original language	English (US)
Pages (from-to)	487-493
Number of pages	7
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	2697
DOIs	https://doi.org/10.1117/12.250263
State	Published - Dec 1 1996
Event	Oxide Superconductor Physics and Nano-Engineering II - San Jose, CA, United States Duration: Jan 30 1996 → Jan 30 1996

Keywords

Josephson junctions
Stacked junctions
Vortex structure

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

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10.1117/12.250263

Cite this

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title = "Studies of static and dynamic properties of multilayered (stacked) Josephson junctions",

abstract = "We have studied the static I-V characteristics and vortex dynamics in stacked Nb/AlOx/Nb Josephson junctions. In josephson junction stacks consisting of two junctions having identical maximum Josephson supercurrent Ic,Ic versus H characteristics deviating from the Fraunhofer pattern have been observed, implying that a structural phase transformation to a triangular vortex lattice occurs with increasing H. Interjunction coupling leads to splitting of the Swihart mode; which manifest itself as Fisk steps with different voltage spacings. When subjected to microwave radiation, the I-V curves of the stacked Josephson junctions exhibit new features which are absent in single junctions.",

keywords = "Josephson junctions, Stacked junctions, Vortex structure",

author = "Song, {Shenian N.} and Maglic, {Stevan R.} and Thomas, {Christopher D.} and Rippert, {Edward D.} and Auvil, {P. R.} and Ulmer, {Melville P} and Ketterson, {John B}",

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journal = "Proceedings of SPIE - The International Society for Optical Engineering",

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note = "Oxide Superconductor Physics and Nano-Engineering II ; Conference date: 30-01-1996 Through 30-01-1996",

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AU - Song, Shenian N.

AU - Maglic, Stevan R.

AU - Thomas, Christopher D.

AU - Rippert, Edward D.

AU - Auvil, P. R.

AU - Ulmer, Melville P

AU - Ketterson, John B

PY - 1996/12/1

Y1 - 1996/12/1

N2 - We have studied the static I-V characteristics and vortex dynamics in stacked Nb/AlOx/Nb Josephson junctions. In josephson junction stacks consisting of two junctions having identical maximum Josephson supercurrent Ic,Ic versus H characteristics deviating from the Fraunhofer pattern have been observed, implying that a structural phase transformation to a triangular vortex lattice occurs with increasing H. Interjunction coupling leads to splitting of the Swihart mode; which manifest itself as Fisk steps with different voltage spacings. When subjected to microwave radiation, the I-V curves of the stacked Josephson junctions exhibit new features which are absent in single junctions.

AB - We have studied the static I-V characteristics and vortex dynamics in stacked Nb/AlOx/Nb Josephson junctions. In josephson junction stacks consisting of two junctions having identical maximum Josephson supercurrent Ic,Ic versus H characteristics deviating from the Fraunhofer pattern have been observed, implying that a structural phase transformation to a triangular vortex lattice occurs with increasing H. Interjunction coupling leads to splitting of the Swihart mode; which manifest itself as Fisk steps with different voltage spacings. When subjected to microwave radiation, the I-V curves of the stacked Josephson junctions exhibit new features which are absent in single junctions.

KW - Josephson junctions

KW - Stacked junctions

KW - Vortex structure

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JF - Proceedings of SPIE - The International Society for Optical Engineering

T2 - Oxide Superconductor Physics and Nano-Engineering II

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ER -

Studies of static and dynamic properties of multilayered (stacked) Josephson junctions

Abstract

Keywords

ASJC Scopus subject areas

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