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arXiv 1003.1408cond-mat.mes-hallcond-mat.dis-nn
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瞬逝电场引起的声学声子隧穿和热输运

Acoustic Phonon Tunneling and Heat Transport due to Evanescent Electric Fields

Mika Prunnila, Johanna Meltaus

摘要:

作者描述了声学声子如何直接穿过真空,从而在被真空间隙隔开的物体之间传递能量和传导热量。这种效应通过引入耦合机制(例如压电性)来实现,所述耦合机制强耦合电场和晶格变形。电场作为消逝场泄漏到真空中,导致固体-真空-固体传输概率有限。由于系统中的强共振,一些声子可以以(或接近)单位透射穿过真空间隙,这导致显著的热导和热通量。

英文摘要:

The authors describe how acoustic phonons can directly tunnel through vacuum and, therefore, transmit energy and conduct heat between bodies that are separated by a vacuum gap. This effect is enabled by introducing a coupling mechanism, such as piezoelectricity, that strongly couples electric field and lattice deformation. The electric field leaks into the vacuum as an evanescent field, which leads to finite solid-vacuum-solid transmission probability. Due to strong resonances in the system some phonons can go through the vacuum gap with (or close to) unity transmission, which leads to significant thermal conductance and heat flux.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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