Deformation Potentials and Electron-Phonon Coupling in Silicon Nanowires
Abstract
The role of reduced dimensionality and of the surface on electron-phonon (e-ph) coupling in silicon nanowires is determined from first principles. Surface termination and chemistry is found to have a relatively small influence, whereas reduced dimensionality fundamentally alters the behavior of deformation potentials. As a consequence, electron coupling to "breathing modes" emerges that cannot be described by conventional treatments of e-ph coupling. The consequences for physical properties such as scattering lengths and mobilities are significant: the mobilities for [110] grown wires are 6 times larger than those for [100] wires, an effect that cannot be predicted without the form we find for Si nanowire deformation potentials.
Cite
@article{arxiv.1002.0719,
title = {Deformation Potentials and Electron-Phonon Coupling in Silicon Nanowires},
author = {F. Murphy-Armando and G. Fagas and J. C. Greer},
journal= {arXiv preprint arXiv:1002.0719},
year = {2025}
}
Comments
to appear in Nano Letters