Arrays of nano-high-transition temperature superconductor quantum interference devices

Hao Li; Han Cai; Nirjhar Sarkar; Jay C. LeFebvre; Ethan Y. Cho; Shane A. Cybart

doi:10.1063/5.0206821

Arrays of nano-high-transition temperature superconductor quantum interference devices

Hao Li
, Han Cai
, Nirjhar Sarkar
, Jay C. LeFebvre
, Ethan Y. Cho
, Shane A. Cybart

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

4 Scopus citations

Abstract

We report the fabrication and testing of arrays of nanoscale superconducting quantum interference devices (SQUIDs) directly written into a thin film of the high-transition temperature superconductor YBa₂Cu-₃O_7−δ with a focused helium ion beam. We compare three array configurations with 400 nm by 400 nm nanoSQUIDs connected in series and parallel and a two-dimensional (2D) combination of both. Our electrical transport measurements show that series arrays of three nanoSQUIDs exhibit modulation voltages greater than 1 mV and that combining the devices in parallel greatly enhances the slope of the voltage-magnetic field characteristic. A 2D array with 3 SQUIDS in series and 7 in parallel exhibited a transfer function of 5.51 mV/mT.

Original language	English
Article number	192603
Journal	Applied Physics Letters
Volume	124
Issue number	19
DOIs	https://doi.org/10.1063/5.0206821
State	Published - May 6 2024
Externally published	Yes

Funding

This work was supported by the Air Force Office of Scientific Research under Grant Nos. FA9550-20-1-0144 and FA9550-23-1-0369.

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10.1063/5.0206821

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title = "Arrays of nano-high-transition temperature superconductor quantum interference devices",

abstract = "We report the fabrication and testing of arrays of nanoscale superconducting quantum interference devices (SQUIDs) directly written into a thin film of the high-transition temperature superconductor YBa2Cu-3O7−δ with a focused helium ion beam. We compare three array configurations with 400 nm by 400 nm nanoSQUIDs connected in series and parallel and a two-dimensional (2D) combination of both. Our electrical transport measurements show that series arrays of three nanoSQUIDs exhibit modulation voltages greater than 1 mV and that combining the devices in parallel greatly enhances the slope of the voltage-magnetic field characteristic. A 2D array with 3 SQUIDS in series and 7 in parallel exhibited a transfer function of 5.51 mV/mT.",

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AU - Li, Hao

AU - Cai, Han

AU - Sarkar, Nirjhar

AU - LeFebvre, Jay C.

AU - Cho, Ethan Y.

AU - Cybart, Shane A.

PY - 2024/5/6

Y1 - 2024/5/6

N2 - We report the fabrication and testing of arrays of nanoscale superconducting quantum interference devices (SQUIDs) directly written into a thin film of the high-transition temperature superconductor YBa2Cu-3O7−δ with a focused helium ion beam. We compare three array configurations with 400 nm by 400 nm nanoSQUIDs connected in series and parallel and a two-dimensional (2D) combination of both. Our electrical transport measurements show that series arrays of three nanoSQUIDs exhibit modulation voltages greater than 1 mV and that combining the devices in parallel greatly enhances the slope of the voltage-magnetic field characteristic. A 2D array with 3 SQUIDS in series and 7 in parallel exhibited a transfer function of 5.51 mV/mT.

AB - We report the fabrication and testing of arrays of nanoscale superconducting quantum interference devices (SQUIDs) directly written into a thin film of the high-transition temperature superconductor YBa2Cu-3O7−δ with a focused helium ion beam. We compare three array configurations with 400 nm by 400 nm nanoSQUIDs connected in series and parallel and a two-dimensional (2D) combination of both. Our electrical transport measurements show that series arrays of three nanoSQUIDs exhibit modulation voltages greater than 1 mV and that combining the devices in parallel greatly enhances the slope of the voltage-magnetic field characteristic. A 2D array with 3 SQUIDS in series and 7 in parallel exhibited a transfer function of 5.51 mV/mT.

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JO - Applied Physics Letters

JF - Applied Physics Letters

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Arrays of nano-high-transition temperature superconductor quantum interference devices

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