Heat localization through reduced dimensionality
| Autor: | Alireza Nojeh, George A. Sawatzky, Harrison D. E. Fan, Mike Chang, Mokter Mahmud Chowdhury |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Condensed Matter - Materials Science
Materials science Condensed Matter - Mesoscale and Nanoscale Physics Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences Thermionic emission 02 engineering and technology Carbon nanotube 021001 nanoscience & nanotechnology 7. Clean energy 01 natural sciences Computational physics Conductor law.invention Micrometre Thermal conductivity law 0103 physical sciences Thermoelectric effect Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Energy transformation 010306 general physics 0210 nano-technology Curse of dimensionality |
| Popis: | We present a model to show that heat propagation away from a local source depends strongly on dimensionality, leading to dramatic localization in low-dimensional systems. An example of such a system is a carbon nanotube array. We further show that this localization is amplified due to a runaway mechanism if thermal conductivity declines rapidly with temperature. Extremely high temperatures of thousands of Kelvins and gradients of hundreds of K/{\mu}m may thus be obtained in a conductor using a modest local power source such as a laser pointer. This is of fundamental importance for high-efficiency energy conversion through thermoelectric and thermionic mechanisms, as well as various other applications. Comment: Main text 19 pages, 5 figures; Supplemental material 9 pages, 6 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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