Magnetic field sensing using a driven double quantum dot

G. Giavaras*, J. Wabnig, B. W. Lovett, J. H. Jefferson, G. A. D. Briggs

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

A microwave-driven double dot system is investigated as a detector for probing a magnetic field gradient. The two dots are connected to metallic leads and a source-drain current flows under microwave irradiation. The induced current as a function of the external magnetic field exhibits resonance effects that depend directly on the local field gradient and any difference in the g-factors between the dots. The properties of the dot detector with respect to temperature, interdot hopping and the magnitude of the field gradient are examined. We demonstrate that the main factor limiting sensitivity is spin relaxation and discuss the issues in applying the method to single spin detection. (C) 2009 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)895-898
Number of pages4
JournalPhysica E: Low-dimensional Systems and Nanostructures
Volume42
Issue number4
DOIs
Publication statusPublished - Feb 2010
Event18th International Conference on Electronic Properties of Two-Dimensional Systems - Kobe, Japan
Duration: 19 Jul 200924 Jul 2009

Keywords

  • Driven double dot
  • Detector
  • Spin resonance
  • SPIN

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