Optimization of the Sensitivity of a Double-Dot Magnetic Detector
We investigate, by means of numerical simulations, the lowest magnetic field level that can be detected with a given relative accuracy with a sensor based on a double-dot device fabricated in a high-mobility two-dimensional electron gas. The double dot consists of a cavity delimited by an input and...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-07-01
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| Series: | Electronics |
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| Online Access: | https://www.mdpi.com/2079-9292/9/7/1134 |
| _version_ | 1797562653948772352 |
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| author | Massimo Macucci Paolo Marconcini Stephan Roche |
| author_facet | Massimo Macucci Paolo Marconcini Stephan Roche |
| author_sort | Massimo Macucci |
| collection | DOAJ |
| description | We investigate, by means of numerical simulations, the lowest magnetic field level that can be detected with a given relative accuracy with a sensor based on a double-dot device fabricated in a high-mobility two-dimensional electron gas. The double dot consists of a cavity delimited by an input and an output constriction, with a potential barrier exactly in the middle. In conditions of perfect symmetry, a strong conductance enhancement effect appears as a consequence of the constructive interference between symmetric trajectories. When the symmetry is broken, for example by the presence of an applied magnetic field, this enhancement effect is suppressed. We explore the design parameter space and assess the minimum magnetic field value that can be measured with a given accuracy in the presence of flicker noise. |
| first_indexed | 2024-03-10T18:32:03Z |
| format | Article |
| id | doaj.art-e28688f6a69140349ffbad36b78628f5 |
| institution | Directory Open Access Journal |
| issn | 2079-9292 |
| language | English |
| last_indexed | 2024-03-10T18:32:03Z |
| publishDate | 2020-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Electronics |
| spelling | doaj.art-e28688f6a69140349ffbad36b78628f52023-11-20T06:33:00ZengMDPI AGElectronics2079-92922020-07-0197113410.3390/electronics9071134Optimization of the Sensitivity of a Double-Dot Magnetic DetectorMassimo Macucci0Paolo Marconcini1Stephan Roche2Dipartimento di Ingegneria dell’Informazione, Università di Pisa, Via G. Caruso 16, I-56122 Pisa, ItalyDipartimento di Ingegneria dell’Informazione, Università di Pisa, Via G. Caruso 16, I-56122 Pisa, ItalyCatalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra, 08193 Barcelona, SpainWe investigate, by means of numerical simulations, the lowest magnetic field level that can be detected with a given relative accuracy with a sensor based on a double-dot device fabricated in a high-mobility two-dimensional electron gas. The double dot consists of a cavity delimited by an input and an output constriction, with a potential barrier exactly in the middle. In conditions of perfect symmetry, a strong conductance enhancement effect appears as a consequence of the constructive interference between symmetric trajectories. When the symmetry is broken, for example by the presence of an applied magnetic field, this enhancement effect is suppressed. We explore the design parameter space and assess the minimum magnetic field value that can be measured with a given accuracy in the presence of flicker noise.https://www.mdpi.com/2079-9292/9/7/1134magnetic sensorquantum dotflicker noisemesoscopic cavity |
| spellingShingle | Massimo Macucci Paolo Marconcini Stephan Roche Optimization of the Sensitivity of a Double-Dot Magnetic Detector Electronics magnetic sensor quantum dot flicker noise mesoscopic cavity |
| title | Optimization of the Sensitivity of a Double-Dot Magnetic Detector |
| title_full | Optimization of the Sensitivity of a Double-Dot Magnetic Detector |
| title_fullStr | Optimization of the Sensitivity of a Double-Dot Magnetic Detector |
| title_full_unstemmed | Optimization of the Sensitivity of a Double-Dot Magnetic Detector |
| title_short | Optimization of the Sensitivity of a Double-Dot Magnetic Detector |
| title_sort | optimization of the sensitivity of a double dot magnetic detector |
| topic | magnetic sensor quantum dot flicker noise mesoscopic cavity |
| url | https://www.mdpi.com/2079-9292/9/7/1134 |
| work_keys_str_mv | AT massimomacucci optimizationofthesensitivityofadoubledotmagneticdetector AT paolomarconcini optimizationofthesensitivityofadoubledotmagneticdetector AT stephanroche optimizationofthesensitivityofadoubledotmagneticdetector |