Acoustic phonon tunneling and heat transport due to evanescent electric fields

Mika Prunnila (Corresponding Author), Johanna Meltaus

Research output: Contribution to journalArticleScientificpeer-review

24 Citations (Scopus)

Abstract

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. Because of 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.
Original languageEnglish
JournalPhysical Review Letters
Volume105
Issue number12
DOIs
Publication statusPublished - 2010
MoE publication typeA1 Journal article-refereed

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heat
vacuum
acoustics
electric fields
phonons
piezoelectricity
tunnels
heat flux
unity
energy

Cite this

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abstract = "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. Because of 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.",
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Acoustic phonon tunneling and heat transport due to evanescent electric fields. / Prunnila, Mika (Corresponding Author); Meltaus, Johanna.

In: Physical Review Letters, Vol. 105, No. 12, 2010.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Prunnila, Mika

AU - Meltaus, Johanna

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N2 - 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. Because of 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.

AB - 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. Because of 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.

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DO - 10.1103/PhysRevLett.105.125501

M3 - Article

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JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

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