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Single-charge detection by an atomic precision tunnel junction

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posted on 2023-06-09, 08:58 authored by M G House, E Peretz, J G Keizer, Samuel HileSamuel Hile, M Y Simmons
We demonstrate sensitive detection of single charges using a planar tunnel junction 8.5?nm wide and 17.2?nm 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 52?nm 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.

History

Publication status

  • Published

File Version

  • Published version

Journal

Applied Physics Letters

ISSN

0003-6951

Publisher

AIP Publishing

Issue

11

Volume

104

Page range

113111

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2018-01-15

First Open Access (FOA) Date

2018-01-15

First Compliant Deposit (FCD) Date

2018-01-15

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