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Fidelity of counting the transferred electrons in a GaAs-based monolithic single-electron pump and transistor system with a charge-lock feedback circuit
- Source :
- Applied Physics Letters. 122:043504
- Publication Year :
- 2023
- Publisher :
- AIP Publishing, 2023.
-
Abstract
- We developed an electron-counting technique for a self-referenced single-electron quantized current source of a single-electron-pump system and investigated the fidelity of our whole measurement process, including single-electron pumping and electron counting by a single-electron transistor (SET) with a charge-lock feedback loop. The device was fabricated monolithically using a two-dimensional electron system of a GaAs/AlGaAs hetero-junction. In addition to the probability of single-electron transfer, we also measured the current noise spectrum of the SET, from which its charge noise power [Formula: see text] was derived. The results show that the estimated charge noise of 2.2 [Formula: see text] for a semiconductor-based SET is comparable to that of metallic SETs.
- Subjects :
- Physics and Astronomy (miscellaneous)
Subjects
Details
- ISSN :
- 10773118 and 00036951
- Volume :
- 122
- Database :
- OpenAIRE
- Journal :
- Applied Physics Letters
- Accession number :
- edsair.doi...........0514be58cf787ea83b7b82c9cdb84992