Tuning current plateau regions in parallelized single-electron pumps
The parallelization of single-electron pumps is a promising method to increase the quantized current level produced from a semiconductor-based single-electron system. In the parallelization of multiple pumps with common gate electrodes, the key process is to fabricate them with high reproducibility,...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2022-10-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0117055 |
| _version_ | 1828335546995310592 |
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| author | Bum-Kyu Kim Byeong-Sung Yu Suk-In Park Jindong Song Nam Kim Myung-Ho Bae |
| author_facet | Bum-Kyu Kim Byeong-Sung Yu Suk-In Park Jindong Song Nam Kim Myung-Ho Bae |
| author_sort | Bum-Kyu Kim |
| collection | DOAJ |
| description | The parallelization of single-electron pumps is a promising method to increase the quantized current level produced from a semiconductor-based single-electron system. In the parallelization of multiple pumps with common gate electrodes, the key process is to fabricate them with high reproducibility, resulting in an overlap of the most accurate regions in current plateaus at the same gate voltages. However, because of the lack of gating reproducibility, we here adopted a separate gate-tuning scheme to realize the overlap of the current plateaus instead of using a common gate scheme. To minimize the number of gates, we used entrance gates in common but an exit gate in separate with an additional in-common gate located outside the quantum dot but near the exit gates. The combination of the additional gate and separate exit gates led to an optimal current plateau overlap with a pair of pumps among six pumps in parallel. Under the optimal plateau-tuned condition, we achieved a relative type-A uncertainty of 1.4 × 10−6 at a 100 pA level with f = 160 MHz in the parallelized mode with the second current plateaus for both pumps. |
| first_indexed | 2024-04-13T21:48:44Z |
| format | Article |
| id | doaj.art-15e18ea7d3fa419e9727e2488abb13f6 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-04-13T21:48:44Z |
| publishDate | 2022-10-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-15e18ea7d3fa419e9727e2488abb13f62022-12-22T02:28:28ZengAIP Publishing LLCAIP Advances2158-32262022-10-011210105118105118-710.1063/5.0117055Tuning current plateau regions in parallelized single-electron pumpsBum-Kyu Kim0Byeong-Sung Yu1Suk-In Park2Jindong Song3Nam Kim4Myung-Ho Bae5Korea Research Institute of Standards and Science, Daejeon 34113, Republic of KoreaDepartment of Physics and Center for Quantum Coherence in Condensed Matter, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of KoreaKorea Institute of Science and Technology, Seoul 02792, Republic of KoreaKorea Institute of Science and Technology, Seoul 02792, Republic of KoreaKorea Research Institute of Standards and Science, Daejeon 34113, Republic of KoreaKorea Research Institute of Standards and Science, Daejeon 34113, Republic of KoreaThe parallelization of single-electron pumps is a promising method to increase the quantized current level produced from a semiconductor-based single-electron system. In the parallelization of multiple pumps with common gate electrodes, the key process is to fabricate them with high reproducibility, resulting in an overlap of the most accurate regions in current plateaus at the same gate voltages. However, because of the lack of gating reproducibility, we here adopted a separate gate-tuning scheme to realize the overlap of the current plateaus instead of using a common gate scheme. To minimize the number of gates, we used entrance gates in common but an exit gate in separate with an additional in-common gate located outside the quantum dot but near the exit gates. The combination of the additional gate and separate exit gates led to an optimal current plateau overlap with a pair of pumps among six pumps in parallel. Under the optimal plateau-tuned condition, we achieved a relative type-A uncertainty of 1.4 × 10−6 at a 100 pA level with f = 160 MHz in the parallelized mode with the second current plateaus for both pumps.http://dx.doi.org/10.1063/5.0117055 |
| spellingShingle | Bum-Kyu Kim Byeong-Sung Yu Suk-In Park Jindong Song Nam Kim Myung-Ho Bae Tuning current plateau regions in parallelized single-electron pumps AIP Advances |
| title | Tuning current plateau regions in parallelized single-electron pumps |
| title_full | Tuning current plateau regions in parallelized single-electron pumps |
| title_fullStr | Tuning current plateau regions in parallelized single-electron pumps |
| title_full_unstemmed | Tuning current plateau regions in parallelized single-electron pumps |
| title_short | Tuning current plateau regions in parallelized single-electron pumps |
| title_sort | tuning current plateau regions in parallelized single electron pumps |
| url | http://dx.doi.org/10.1063/5.0117055 |
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