Time-resolved energy transduction in a quantum capacitor
The capability to deposit charge and energy quantum-by-quantum into a specific atomic site could lead to many previously unidentified applications. Here we report on the quantum capacitor formed by a strongly localized field possessing such capability. We investigated the charging dynamics of such a...
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| Veröffentlicht in: | Proceedings of the National Academy of Sciences - PNAS 2011-08, Vol.108 (34), p.13973-13977 |
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| container_end_page | 13977 |
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| container_issue | 34 |
| container_start_page | 13973 |
| container_title | Proceedings of the National Academy of Sciences - PNAS |
| container_volume | 108 |
| creator | Jung, Woojin Cho, Doohee Kim, Min-Kook Choi, Hyoung Joon Lyo, In-Whan |
| description | The capability to deposit charge and energy quantum-by-quantum into a specific atomic site could lead to many previously unidentified applications. Here we report on the quantum capacitor formed by a strongly localized field possessing such capability. We investigated the charging dynamics of such a capacitor by using the unique scanning tunneling microscopy that combines nanosecond temporal and subangstrom spatial resolutions, and by using Si(001) as the electrode as well as the detector for excitations produced by the charging transitions. We show that sudden switching of a localized field induces a transiently empty quantum dot at the surface and that the dot acts as a tunable excitation source with subangstrom site selectivity. The timescale in the deexcitation of the dot suggests the formation of long-lived, excited states. Our study illustrates that a quantum capacitor has serious implications not only for the bottom-up nanotechnology but also for future switching devices. |
| doi_str_mv | 10.1073/pnas.1102474108 |
| format | Article |
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Here we report on the quantum capacitor formed by a strongly localized field possessing such capability. We investigated the charging dynamics of such a capacitor by using the unique scanning tunneling microscopy that combines nanosecond temporal and subangstrom spatial resolutions, and by using Si(001) as the electrode as well as the detector for excitations produced by the charging transitions. We show that sudden switching of a localized field induces a transiently empty quantum dot at the surface and that the dot acts as a tunable excitation source with subangstrom site selectivity. The timescale in the deexcitation of the dot suggests the formation of long-lived, excited states. 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| source | Jstor Complete Legacy; PubMed Central; Alma/SFX Local Collection; Free Full-Text Journals in Chemistry |
| subjects | Atoms Bending Capacitors Dimers Electric fields Electric power Electrical equipment Energy Imaging Microscopy Physical Sciences Quantum dots Quantum tunneling scanning tunneling microscopy Solitons Switching |
| title | Time-resolved energy transduction in a quantum capacitor |
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