Cooling of mechanical vibrations by heat flow
We theoretically consider a nanomechanical link between two metallic leads subject to a temperature drop. It is shown that mechanical dynamics of such system can be strongly affected by a heat flow through it via the position dependent electron-electron interaction, even though the electronic trans...
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| Published in: | Физика низких температур |
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| Date: | 2018 |
| Main Authors: | , |
| Format: | Article |
| Language: | English |
| Published: |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2018
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| Subjects: | |
| Online Access: | https://nasplib.isofts.kiev.ua/handle/123456789/176440 |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Cooling of mechanical vibrations by heat flow / S.I. Kulinich, L.Y. Gorelik// Физика низких температур. — 2018. — Т. 44, № 12. — С. 1582-1587. — Бібліогр.: 8 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| Summary: | We theoretically consider a nanomechanical link between two metallic leads subject to a temperature drop. It
is shown that mechanical dynamics of such system can be strongly affected by a heat flow through it via the position dependent electron-electron interaction, even though the electronic transport between leads is blocked. In
particular, it is demonstrated that, under certain conditions, the stationary distribution of the excitations in the
mechanical subsystem has a Boltzmann form with an effective temperature, which is much lower than the temperature of the environment; this seems rather counterintuitive. We also find that a change in the direction of the
temperature gradient can result in the generation of mechanical vibrations rather than the heating of the mechanical subsystem.
We theoretically consider a nanomechanical link between two metallic leads subject to a temperature drop. It
is shown that mechanical dynamics of such system can be strongly affected by a heat flow through it via the position dependent electron-electron interaction, even though the electronic transport between leads is blocked. In
particular, it is demonstrated that, under certain conditions, the stationary distribution of the excitations in the
mechanical subsystem has a Boltzmann form with an effective temperature, which is much lower than the temperature of the environment; this seems rather counterintuitive. We also find that a change in the direction of the
temperature gradient can result in the generation of mechanical vibrations rather than the heating of the mechanical subsystem.
Рассмотрена наномеханическая связь между двумя металлическими электродами, которые поддерживаются при различной температуре. Показано, что механическая динамика в
такой системе существенным образом определяется тепловым
потоком. Существование ненулевого теплового потока обусловлено электрон-электронным взаимодействием, при этом
поток заряда между электродами отсутствует. Установлено,
что при определенных условиях стационарное распределение
возбуждений в механической подсистеме имеет вид больцмановской функции распределения с эффективной температурой,
которая значительно ниже температуры электродов. Также
показано, что изменение направления градиента температуры приводит к механическим колебаниям, а не к нагреву
механической подсистемы.
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| ISSN: | 0132-6414 |