Hot phonon controlled-junction superconducting quantum interference device

G. D. Hutchinson, H. Qin, D. J. Kang, Seung-Beck Lee, D. G. Hasko, M. G. Blamire, D. A. Williams

Research output: Contribution to journalConference article

2 Citations (Scopus)

Abstract

The optimal design of a direct current superconducting quantum interference device (DC-SQUID) with high sensitivity requires two identical Josephson junctions, which is difficult to achieve. The design of a DC-SQUID using controlled Josephson junction technology provides a mechanism for modifying the characteristics of the device. Here we report on the nano-fabrication and measurement of a DC-SQUID utilizing two Dayem bridge weak-link Josephson junctions fabricated with a width ∼100 nm and a length of ∼200 nm. These junctions are controlled via the irradiation of hot phonons from nearby titanium/chromium normal metal constrictions which are current biased. The devices were measured at a temperature of 4.2 K and control over the critical current oscillations was observed.

Original languageEnglish
Pages (from-to)1544-1549
Number of pages6
JournalSuperconductor Science and Technology
Volume16
Issue number12
DOIs
StatePublished - 2003 Dec 1
EventISEC 2003, International Superconducting Electronics Conference - Sydney,NSW, Australia
Duration: 2003 Jul 72003 Jul 11

Fingerprint

SQUIDs
interference
Josephson junctions
direct current
Critical currents
Chromium
Phonons
Titanium
Nanotechnology
Metals
Irradiation
nanofabrication
chromium
critical current
constrictions
phonons
titanium
oscillations
irradiation
sensitivity

Cite this

Hutchinson, G. D., Qin, H., Kang, D. J., Lee, S-B., Hasko, D. G., Blamire, M. G., & Williams, D. A. (2003). Hot phonon controlled-junction superconducting quantum interference device. Superconductor Science and Technology, 16(12), 1544-1549. https://doi.org/10.1088/0953-2048/16/12/049
Hutchinson, G. D. ; Qin, H. ; Kang, D. J. ; Lee, Seung-Beck ; Hasko, D. G. ; Blamire, M. G. ; Williams, D. A. / Hot phonon controlled-junction superconducting quantum interference device. In: Superconductor Science and Technology. 2003 ; Vol. 16, No. 12. pp. 1544-1549.
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Hutchinson, GD, Qin, H, Kang, DJ, Lee, S-B, Hasko, DG, Blamire, MG & Williams, DA 2003, 'Hot phonon controlled-junction superconducting quantum interference device', Superconductor Science and Technology, vol. 16, no. 12, pp. 1544-1549. https://doi.org/10.1088/0953-2048/16/12/049

Hot phonon controlled-junction superconducting quantum interference device. / Hutchinson, G. D.; Qin, H.; Kang, D. J.; Lee, Seung-Beck; Hasko, D. G.; Blamire, M. G.; Williams, D. A.

In: Superconductor Science and Technology, Vol. 16, No. 12, 01.12.2003, p. 1544-1549.

Research output: Contribution to journalConference article

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T1 - Hot phonon controlled-junction superconducting quantum interference device

AU - Hutchinson, G. D.

AU - Qin, H.

AU - Kang, D. J.

AU - Lee, Seung-Beck

AU - Hasko, D. G.

AU - Blamire, M. G.

AU - Williams, D. A.

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AB - The optimal design of a direct current superconducting quantum interference device (DC-SQUID) with high sensitivity requires two identical Josephson junctions, which is difficult to achieve. The design of a DC-SQUID using controlled Josephson junction technology provides a mechanism for modifying the characteristics of the device. Here we report on the nano-fabrication and measurement of a DC-SQUID utilizing two Dayem bridge weak-link Josephson junctions fabricated with a width ∼100 nm and a length of ∼200 nm. These junctions are controlled via the irradiation of hot phonons from nearby titanium/chromium normal metal constrictions which are current biased. The devices were measured at a temperature of 4.2 K and control over the critical current oscillations was observed.

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