Dynamically Broken Symmetry in Periodically Gated Quantum Dots: Charge Accumulation and DC-current
Time-dependent electron transport through a quantum dot and double quantum dot systems in the presence of polychromatic external periodic quantum dot energy-level modulations is studied within the time evolution operator method for a tight-binding Hamiltonian. Analytical relations for the dc-current...
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| Видавець: | Відділення фізики і астрономії НАН України |
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| Дата: | 2010 |
| Автори: | , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Відділення фізики і астрономії НАН України
2010
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| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/13289 |
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| Цитувати: | Dynamically Broken Symmetry in Periodically Gated Quantum Dots: Charge Accumulation and DC-current / T. Kwapiński, S. Kohler, P. Hänggi // Укр. фіз. журн. — 2010. — Т. 55, № 1. — С. 85-94. — Бібліогр.: 34 назв. — англ. |
Репозиторії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
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irk-123456789-132892010-11-05T12:02:19Z Dynamically Broken Symmetry in Periodically Gated Quantum Dots: Charge Accumulation and DC-current Kwapiński, T. Kohler, S. Hänggi, P. Наносистеми Time-dependent electron transport through a quantum dot and double quantum dot systems in the presence of polychromatic external periodic quantum dot energy-level modulations is studied within the time evolution operator method for a tight-binding Hamiltonian. Analytical relations for the dc-current flowing through the system and the charge accumulated on a quantum dot are obtained for the zero-temperature limit. It is shown that, in the presence of periodic perturbations, the sideband peaks of the transmission are related to the combination of frequencies of the applied modulations. For a double quantum dot system under the influence of polychromatic perturbations, the quantum pump effect is studied in the absence of a source (drain) and static bias voltages. In the presence of a spatial symmetry, the charge is pumped through the system due to a broken generalized parity symmetry. Дослiджено залежний вiд часу транспорт електронiв через квантову точку i систему двох квантових точок при зовнiшнiй полiхромнiй перiодичнiй модуляцiї рiвнiв енергiї в межах методу оператора часової еволюцiї з гамiльтонiаном сильного зв’язку. Одержано аналiтичнi формули для постiйного струму через систему та для заряду, який накопичено на квантовiй точцi у границi нульової температури. Показано, що в присутностi перiодичних збурень боковi максимуми передачi залежать вiд спiввiдношення зовнiшнiх модуляцiй. Вивчено ефект квантової накачки за вiдсутностi джерела (стока) i статичних напружень змiщення. У випадку просторової симетрiї заряд накачується через систему внаслiдок порушення симетрiї узагальненої парностi. 2010 Article Dynamically Broken Symmetry in Periodically Gated Quantum Dots: Charge Accumulation and DC-current / T. Kwapiński, S. Kohler, P. Hänggi // Укр. фіз. журн. — 2010. — Т. 55, № 1. — С. 85-94. — Бібліогр.: 34 назв. — англ. 2071-0194 PACS 05.69.Gg, 73.23.-b, 73.63.Nm http://dspace.nbuv.gov.ua/handle/123456789/13289 en Відділення фізики і астрономії НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| topic |
Наносистеми Наносистеми |
| spellingShingle |
Наносистеми Наносистеми Kwapiński, T. Kohler, S. Hänggi, P. Dynamically Broken Symmetry in Periodically Gated Quantum Dots: Charge Accumulation and DC-current |
| description |
Time-dependent electron transport through a quantum dot and double quantum dot systems in the presence of polychromatic external periodic quantum dot energy-level modulations is studied within the time evolution operator method for a tight-binding Hamiltonian. Analytical relations for the dc-current flowing through the system and the charge accumulated on a quantum dot are obtained for the zero-temperature limit. It is shown that, in the presence of periodic perturbations, the sideband peaks of the transmission are related to the combination of frequencies of the applied modulations. For a double quantum dot system under the influence of polychromatic perturbations, the quantum pump effect is studied in the absence of a source (drain) and static bias voltages. In the presence of a spatial symmetry, the charge is pumped through the system due to a broken generalized parity symmetry. |
| format |
Article |
| author |
Kwapiński, T. Kohler, S. Hänggi, P. |
| author_facet |
Kwapiński, T. Kohler, S. Hänggi, P. |
| author_sort |
Kwapiński, T. |
| title |
Dynamically Broken Symmetry in Periodically Gated Quantum Dots: Charge Accumulation and DC-current |
| title_short |
Dynamically Broken Symmetry in Periodically Gated Quantum Dots: Charge Accumulation and DC-current |
| title_full |
Dynamically Broken Symmetry in Periodically Gated Quantum Dots: Charge Accumulation and DC-current |
| title_fullStr |
Dynamically Broken Symmetry in Periodically Gated Quantum Dots: Charge Accumulation and DC-current |
| title_full_unstemmed |
Dynamically Broken Symmetry in Periodically Gated Quantum Dots: Charge Accumulation and DC-current |
| title_sort |
dynamically broken symmetry in periodically gated quantum dots: charge accumulation and dc-current |
| publisher |
Відділення фізики і астрономії НАН України |
| publishDate |
2010 |
| topic_facet |
Наносистеми |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/13289 |
| citation_txt |
Dynamically Broken Symmetry in Periodically Gated Quantum Dots: Charge Accumulation and DC-current / T. Kwapiński, S. Kohler, P. Hänggi // Укр. фіз. журн. — 2010. — Т. 55, № 1. — С. 85-94. — Бібліогр.: 34 назв. — англ. |
| work_keys_str_mv |
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| first_indexed |
2023-10-18T16:50:55Z |
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2023-10-18T16:50:55Z |
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