Thermal Conductivity in Biphasic Silicon Nanowires
The work unravels the previously unexplored atomic-scale mechanism involving the interaction of phonons with crystal homointerfaces. Silicon nanowires with engineered isotopic content and crystal phases were chosen for this investigation. Crystal polytypism, manifested by the presence of both diamond cubic and rhombohedral phases within the same nanowire, provided a testbed to study the impact of phase homointerfaces on phonon transport. The lattice thermal conductivity and its temperature response were found to be markedly different in the presence of polytypism. Its origin, however, was not traced to any acoustic mismatch as the polytypic nanowires presented a similar phonon spectrum as their counterparts. Rather, phenomenological modeling and atomistic simulations identified and quantified the role of atomically rough homointerfaces and the subsequent phonon scattering from such homointerfaces in shaping the phonon behavior. This framework provides the inputs necessary to advance the design and modeling of phonon transport in nanoscale semiconductors.
Authors
- Jordi Arbiol (ORCID: https://orcid.org/0000-0002-0695-1726)
- Marcin Wajs
- Uri Givan
- S. Francoeur (ORCID: https://orcid.org/0000-0002-6129-7026)
- Samik Mukherjee (ORCID: https://orcid.org/0000-0002-5279-1110)
- Oussama Moutanabbir (ORCID: https://orcid.org/0000-0002-0721-3696)
- María Chiara Spadaro (ORCID: https://orcid.org/0000-0002-6540-0377)
- Stephan Senz
- M. Gonzalez-Catala
- Sebastian Volz (ORCID: https://orcid.org/0000-0002-5164-8048)
- Zhongwei Zhang (ORCID: https://orcid.org/0009-0004-3909-761X)
Institutions
- Tongji University (CN)
- Institució Catalana de Recerca i Estudis Avançats (ES)
- University of Catania (IT)
- Laboratory for Integrated Micro-Mechatronic Systems (JP)
- Max Planck Institute of Microstructure Physics (DE)
- Institut Català de Nanociència i Nanotecnologia (ES)
- Jio Institute
- Polytechnique Montréal (CA)
- The University of Tokyo (JP)
Publication Details
- Journal
- Nano Letters
- Published
- 2024-11-08
- DOI
- https://doi.org/10.1021/acs.nanolett.4c03720
- Primary Topic
- Thermal properties of materials
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Canada Foundation for Innovation
- European Commission
- Canada Research Chairs
- National Natural Science Foundation of China
- Generalitat de Catalunya
- Ministère de la Défense Nationale
- Horizon 2020 Framework Programme
- Natural Sciences and Engineering Research Council of Canada
- Agencia Estatal de Investigación
- Air Force Office of Scientific Research
- Army Research Office