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Precise control of thermal conductivity at the nanoscale through individual phonon-scattering barriers
Open accessAbstract
The ability to precisely control the thermal conductivity (kappa) of a material is fundamental in the development of on-chip heat management or energy conversion applications. Nanostructuring permits a marked reduction of kappa of single-crystalline materials, as recently demonstrated for silicon nanowires. However, silicon-based nanostructured materials with extremely low kappa are not limited to nanowires. By engineering a set of individual phonon-scattering nanodot barriers we have accurately tailored the thermal conductivity of a single-crystalline SiGe material in spatially defined regions as short as approximately 15 nm. Single-barrier thermal resistances between 2 and 4 x 10(-9) m(2) K W(-1) were attained, resulting in a room-temperature kappa down to about 0.9 W m(-1) K(-1), in multilayered structures with as little as five barriers. Such low thermal conductivity is compatible with a totally diffuse mismatch model for the barriers, and it is well below the amorphous limit. The results are in agreement with atomistic Green's function simulations.
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“This ASOPS-TDTR technique, with its ~10 times faster data acquisition speed and free of artefacts associated with the moving delay stage, has been successfully employed in several studies”
From Tutorial: Time-domain thermoreflectance (TDTR) for thermal property characterization of bulk and thin film materials (2018) · cites this paper as [174]
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Metadata
- Authors
- Pernot, G., Stoffel, M., Savic, I., Pezzoli, F., Chen, P., Savelli, G., Jacquot, A., Schumann, J., Denker, U., Mönch, I., Deneke, C., Schmidt, O. G., Rampnoux, J. M., Wang, S., Plissonnier, M., Rastelli, A., Dilhaire, S., & Mingo, N.
- Affiliations
- Centre National de la Recherche Scientifique (FR)
- Leibniz Institute for Solid State and Materials Research (DE)
- Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR)
- Fraunhofer Institute for Physical Measurement Techniques (DE)
- Max Planck Institute for Solid State Research (DE)
- University of California, Santa Cruz (US)
- Corresponding author
- Rastelli, A.
- Dilhaire, S.
- Mingo, N.
- ORCID
- Venue
- Nature Materials
- Published
- 2010-05-02
- Volume
- 9
- Issue
- 6
- Pages
- 491-495
- ISSN
- 1476-1122 (ISSN-L)
- 1476-4660
- OpenAlex
- W2017969431
- Cited by
- 375
- References
- 42
- Citations by year
- 2026: 4 · 2025: 11 · 2024: 19 · 2023: 11 · 2022: 21 · 2021: 18 · 2020: 29 · 2019: 20 · 2018: 28 · 2017: 31 · 2016: 34 · 2015: 31 · 2014: 25 · 2013: 31 · 2012: 31
- FWCI
- 14.62
- Type
- journal article
- Language
- en
- Open access
- green
- hal.science
- Licence
- Locations
- Nature Materials (publishedVersion)
- PubMed (publishedVersion)
- HAL (submittedVersion, cc-by-nc-sa)
- Publikationsdatenbank der Fraunhofer-Gesellschaft (Fraunhofer-Gesellschaft) (submittedVersion)
- Oskar-Bordeaux (Universite de Bordeaux) (submittedVersion, cc-by-nc-sa)
- Fraunhofer-Publica (Fraunhofer-Gesellschaft) (submittedVersion)
- Funders
- Agence Nationale de la Recherche (ANR-06-NANO-0020, ANR-06-NANO-0054, ANR-06-BLAN-0129)
- Topics
- Physical Sciences › Materials Science › Materials Chemistry › Thermal properties of materials
- Physical Sciences › Engineering › Civil and Structural Engineering › Thermal Radiation and Cooling Technologies
- Physical Sciences › Materials Science › Materials Chemistry › Advanced Thermoelectric Materials and Devices
- Keywords
- thermal conductivity control, phonon scattering, SiGe, silicon nanowires, nanostructuring, thermal resistance, diffuse mismatch model, low thermal conductivity
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