Electrically Tunable Multiterminal SQUID-on-Tip

Aviram Uri*, Alexander Y. Meltzer, Yonathan Anahory, Lior Embon, Ella O. Lachman, Dorri Halbertal, Naren Hr, Yuri Myasoedov, Martin E. Huber, Andrea F. Young, Eli Zeldov

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

We present a new nanoscale superconducting quantum interference device (SQUID) whose interference pattern can be shifted electrically in situ. The device consists of a nanoscale four-terminal-four-junction SQUID fabricated at the apex of a sharp pipet using a self-aligned three-step deposition of Pb. In contrast to conventional two-terminal-two-junction SQUIDs that display optimal sensitivity when flux biased to about a quarter of the flux quantum, the additional terminals and junctions allow optimal sensitivity at arbitrary applied flux, thus eliminating the magnetic field "blind spots". We demonstrate spin sensitivity of 5 to 8 μB/Hz1/2 over a continuous field range of 0 to 0.5 T with promising applications for nanoscale scanning magnetic imaging.

Original languageAmerican English
Pages (from-to)6910-6915
Number of pages6
JournalNano Letters
Volume16
Issue number11
DOIs
StatePublished - 9 Nov 2016
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2016 American Chemical Society.

Keywords

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

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