Acoustic phonons and strain in core/shell nanowires

  title={Acoustic phonons and strain in core/shell nanowires},
  author={Christoph Kloeffel and Mircea Trif and Daniel Loss},
  journal={Physical Review B},
We study theoretically the low-energy phonons and the static strain in cylindrical core/shell nanowires (NWs). Assuming pseudomorphic growth, isotropic media, and a force-free wire surface, we derive algebraic expressions for the dispersion relations, the displacement fields, and the stress and strain components from linear elasticity theory. Our results apply to NWs with arbitrary radii and arbitrary elastic constants for both core and shell. The expressions for the static strain are… 

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