| Autor: |
Davis, Bruce L., Hussein, Mahmoud I. |
| Rok vydání: |
2013 |
| Předmět: |
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| Zdroj: |
Physical Review Letters 112, 055505 (2014) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevLett.112.055505 |
| Popis: |
We present the concept of a locally resonant nanophononic metamaterial for thermoelectric energy conversion. Our configuration, which is based on a silicon thin-film with a periodic array of pillars erected on one or two of the free surfaces, qualitatively alters the base thin-film phonon spectrum due to a hybridization mechanism between the pillar local resonances and the underlying atomic lattice dispersion. Using an experimentally-fitted lattice-dynamics-based model, we conservatively predict a drop in the metamaterial thermal conductivity to as low as 50% of the corresponding uniform thin-film value despite the fact that the pillars add more phonon modes to the spectrum. |
| Databáze: |
arXiv |
| Externí odkaz: |
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