Elastic mismatch induced reduction of the thermal conductivity of silicon with aluminum nano-inclusions
Abstract
We use aluminum nano-inclusions in silicon to demonstrate the dominance of elastic modulus mismatch induced scattering in phonon transport. We use time domain thermoreflectance to measure the thermal conductivity of thin films of silicon co-deposited with aluminum via molecular beam epitaxy resulting in a Si film with 10% clustered Al inclusions with nanoscale dimensions and a reduction in thermal conductivity of over an order of magnitude. We compare these results with well-known models in order to demonstrate that the reduction in the thermal transport is driven by elastic mismatch effects induced by aluminum in the system.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 21, 2018
- Source ID
- 10.1063/1.5019269
Entities
People
- Ashutosh Giri
- Brian F. Donovan
- Jerrold A. Floro
- Long Chen
- Patrick E Hopkins
- S. J. Poon
- Wade A. Jensen
Organizations
- Air Force Office of Scientific Research
- Office of Naval Research Global
- United States Naval Academy
- University of Virginia