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Electrically Tunable Multiterminal SQUID-on-Tip.

Aviram Uri¹, Alexander Y Meltzer¹, Yonathan Anahory¹

¹Department of Condensed Matter Physics, Weizmann Institute of Science , Rehovot 7610001, Israel.

|September 28, 2016

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This summary is machine-generated.

Researchers developed a novel nanoscale superconducting quantum interference device (SQUID) with an electrically tunable interference pattern. This advancement eliminates magnetic field blind spots, enhancing sensitivity for magnetic imaging applications.

Area of Science:

Physics
Materials Science
Quantum Technology

Background:

Superconducting Quantum Interference Devices (SQUIDs) are crucial for sensitive magnetic field detection.
Conventional SQUIDs have limitations, including magnetic field 'blind spots' that reduce optimal sensitivity.

Purpose of the Study:

To develop a new nanoscale SQUID with an electrically tunable interference pattern.
To overcome the limitations of conventional SQUIDs by eliminating magnetic field blind spots.

Main Methods:

Fabrication of a nanoscale four-terminal-four-junction SQUID using a self-aligned three-step deposition of lead (Pb).
In situ electrical tuning of the SQUID's interference pattern.

Main Results:

Keywords:

SQUID-on-tip Superconducting quantum interference device current-phase relations nanoscale magnetic imaging

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Demonstrated electrical in situ shifting of the interference pattern.

Achieved optimal sensitivity at arbitrary applied flux, eliminating magnetic field blind spots.

Showcased spin sensitivity of 5 to 8 μB/Hz^1/2 over a 0 to 0.5 T field range.

Conclusions:

The new nanoscale SQUID design offers enhanced sensitivity and eliminates blind spots.
This technology holds promise for advanced nanoscale scanning magnetic imaging.