Parallelized Single Electron Pumps Based on Gate-Tunable Quantum Dot
| Autor: | Changki Hong, Ye-Hwan Ahn, Myung-Ho Bae, Yunchul Chung, Young-Seok Ghee, Nam Kim |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
business.industry Voltage control Resolution (electron density) Physics::Optics Order (ring theory) Heterojunction 02 engineering and technology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 021001 nanoscience & nanotechnology 01 natural sciences Single electron Quantum dot Logic gate 0103 physical sciences Optoelectronics Electric potential 010306 general physics 0210 nano-technology business |
| Zdroj: | 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018). |
| Popis: | In order to increase the output current level, we have fabricated a parallelized pump with two gate-tunable quantum-dot pumps based on GaAs/AlGaAs heterostructure. Each pump device is composed of multiple gates forming a quantum dot whose potential shapes and barrier heights are tunable. At optimally potential-tuned condition, we have confirmed that the parallelized pump could be considered as a single pump and its theoretically estimated accuracy stays almost the same as the single one within the theoretical resolution. Thus we produce $I=192\ \mathbf{pA}$ at 0.6 GHz with an expected accuracy as low as 10−6 level. |
| Databáze: | OpenAIRE |
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