Directional thermal channeling: A phenomenon triggered by tight packing of heat sources
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| Abstract |
Understanding nanoscale thermal transport is critical for nano-engineered devices such as quantum sensors, thermoelectrics, and nanoelectronics. However, despite overwhelming experimental evidence for nondiffusive heat dissipation from nanoscale heat sources, the underlying mechanisms are still not understood. In this work, we show that for nanoscale heat source spacings that are below the mean free path of the dominant phonons in a substrate, close packing of the heat sources increases in-plane scattering and enhances cross-plane thermal conduction. |
| Year of Publication |
2021
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| Date Published |
2021-10
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| Journal Title |
Proceedings of the National Academy of Sciences
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| Volume |
118
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| Issue |
40
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| Start Page or Article ID |
e2109056118
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| ISSN Number |
0027-8424, 1091-6490
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| DOI | |
| Download citation | |
| JILA PI | |
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| Associated Institutes | |
Journal Article
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| Publication Status |
The Physics Frontiers Centers (PFC) program supports university-based centers and institutes where the collective efforts of a larger group of individuals can enable transformational advances in the most promising research areas. The program is designed to foster major breakthroughs at the intellectual frontiers of physics by providing needed resources such as combinations of talents, skills, disciplines, and/or specialized infrastructure, not usually available to individual investigators or small groups, in an environment in which the collective efforts of the larger group can be shown to be seminal to promoting significant progress in the science and the education of students. PFCs also include creative, substantive activities aimed at enhancing education, broadening participation of traditionally underrepresented groups, and outreach to the scientific community and general public.