Single-charge detection by an atomic precision tunnel junction

M. G. House; E. Peretz; J. G. Keizer; S. J. Hile; M. Y. Simmons

doi:10.1063/1.4869032

Single-charge detection by an atomic precision tunnel junction

Mesoscale and Nanoscale Physics 2016-10-05 v1

Authors: M. G. House , E. Peretz , J. G. Keizer , S. J. Hile , M. Y. Simmons

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Abstract

We demonstrate sensitive detection of single charges using a planar tunnel junction 8.5nm wide and 17.2nm long defined by an atomically precise phosphorus doping profile in silicon. The conductance of the junction responds to a nearby gate potential and also to changes in the charge state of a quantum dot patterned 52nm away. The response of this detector is monotonic across the entire working voltage range of the device, which will make it particularly useful for studying systems of multiple quantum dots. The charge sensitivity is maximized when the junction is most conductive, suggesting that more sensitive detection can be achieved by shortening the length of the junction to increase its conductance.

Keywords

superconducting tunnel junctions particle detector

Cite

@article{arxiv.1403.5320,
  title  = {Single-charge detection by an atomic precision tunnel junction},
  author = {M. G. House and E. Peretz and J. G. Keizer and S. J. Hile and M. Y. Simmons},
  journal= {arXiv preprint arXiv:1403.5320},
  year   = {2016}
}

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4 pages; 4 figures

Single-charge detection by an atomic precision tunnel junction

Abstract

Keywords

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