Abstract
The impact of uniaxial and hydrostatic stress on the ballistic thermal conductance (jl) and the specific heat (Cv) of [100] and [110] Si nanowires are explored using a Modified Valence Force Field phonon model. An anisotropic behavior of jl and isotropic nature of Cv under strain are predicted for the two wire orientations. Compressive (tensile) strain decreases (increases) Cv. The Cv trend with strain is controlled by the high energy phonon sub-bands. Dominant contribution of the low/mid (low/high) energy bands in [100] ([110]) wire and their variation under strain governs thebehaviorofjl.VC 2011AmericanInstituteofPhysics.
DOI
10.1063/1.3630228
Citation
Applied Phys. Letters 99, 083115 (2011)
Date of this Version
8-26-2011
Recommended Citation
Paul, Abhijeet and Klimeck, Gerhard, "Strain Effects on the Phonon Thermal Properties of Ultra-Scaled Si Nanowires" (2011). Birck and NCN Publications. Paper 800.
http://dx.doi.org/10.1063/1.3630228
Comments
Copyright (2011) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters: Volume 99, Issue 8 and may be found at http://dx.doi.org/10.1063/1.3630228. The following article has been submitted to/accepted by Applied Physics Letters. Copyright (2011) Abhijeet Paul and Gerhard Klimeck. This article is distributed under a Creative Commons Attribution 3.0 Unported License.