The observation of non-integral Shapiro steps of a high-Tc superconducting dc SQUID

J. D. Chern; H. C. Yang; J. H. Lu; H. E. Horng

doi:10.1016/S0921-4534(97)01294-X

The observation of non-integral Shapiro steps of a high-Tc superconducting dc SQUID

J. D. Chern^*, H. C. Yang, J. H. Lu, H. E. Horng

^*Corresponding author for this work

Undergraduate Program of Electro-Optical Engineering

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

1 Citation (Scopus)

Abstract

An unusual oscillatory behavior of the magnitude of non-integral Shapiro steps versus applied magnetic fields was observed, on a bi-epitaxial dc SQUID, illuminated by a microwave source. Preliminary results suggest that the expected position of the first Shapiro step was splitted into two steps; one is larger, while the other smaller than the magnitude of the expected step. A proposed reason for the observation of non-integral steps is attributed to the possible existence of a finite resistance, connected in series to one of the single Josephson junctions, in the asymmetric dc SQUID circuitry, causing a splitting effect of the Shapiro steps.

Original language	English
Pages (from-to)	2451-2452
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	282
Issue number	PART 4
DOIs	https://doi.org/10.1016/S0921-4534(97)01294-X
Publication status	Published - 1997 Aug

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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title = "The observation of non-integral Shapiro steps of a high-Tc superconducting dc SQUID",

abstract = "An unusual oscillatory behavior of the magnitude of non-integral Shapiro steps versus applied magnetic fields was observed, on a bi-epitaxial dc SQUID, illuminated by a microwave source. Preliminary results suggest that the expected position of the first Shapiro step was splitted into two steps; one is larger, while the other smaller than the magnitude of the expected step. A proposed reason for the observation of non-integral steps is attributed to the possible existence of a finite resistance, connected in series to one of the single Josephson junctions, in the asymmetric dc SQUID circuitry, causing a splitting effect of the Shapiro steps.",

author = "Chern, {J. D.} and Yang, {H. C.} and Lu, {J. H.} and Horng, {H. E.}",

note = "Funding Information: work was supported by the National Science numbers NSC86-2 I 12-M002-0 13 and NSC86-28",

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AU - Chern, J. D.

AU - Yang, H. C.

AU - Lu, J. H.

AU - Horng, H. E.

N1 - Funding Information: work was supported by the National Science numbers NSC86-2 I 12-M002-0 13 and NSC86-28

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N2 - An unusual oscillatory behavior of the magnitude of non-integral Shapiro steps versus applied magnetic fields was observed, on a bi-epitaxial dc SQUID, illuminated by a microwave source. Preliminary results suggest that the expected position of the first Shapiro step was splitted into two steps; one is larger, while the other smaller than the magnitude of the expected step. A proposed reason for the observation of non-integral steps is attributed to the possible existence of a finite resistance, connected in series to one of the single Josephson junctions, in the asymmetric dc SQUID circuitry, causing a splitting effect of the Shapiro steps.

AB - An unusual oscillatory behavior of the magnitude of non-integral Shapiro steps versus applied magnetic fields was observed, on a bi-epitaxial dc SQUID, illuminated by a microwave source. Preliminary results suggest that the expected position of the first Shapiro step was splitted into two steps; one is larger, while the other smaller than the magnitude of the expected step. A proposed reason for the observation of non-integral steps is attributed to the possible existence of a finite resistance, connected in series to one of the single Josephson junctions, in the asymmetric dc SQUID circuitry, causing a splitting effect of the Shapiro steps.

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The observation of non-integral Shapiro steps of a high-Tc superconducting dc SQUID

Abstract

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