Strain Effects on the Phonon Thermal Properties of Ultra-Scaled Si Nanowires
Date of this Version8-26-2011
Applied Phys. Letters 99, 083115 (2011)
The impact of uniaxial and hydrostatic stress on the ballistic thermal conductance (jl) and the specific heat (Cv) of  and  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  () wire and their variation under strain governs thebehaviorofjl.VC 2011AmericanInstituteofPhysics.
Nanoscience and Nanotechnology