Phonon Trapping in Pearl-Necklace-Shaped Silicon Nanowires.

Electron and phonon transport in silicon nanowires: Atomistic approach to thermoelectric properties

Quantum transport including nonparabolicity and phonon scattering: application to silicon nanowires

In this work, the particular and combined influence of nonparabolicity and phonon scattering on the device characteristics of a triple-gate silicon nanowire is investigated. In addition, different approximations of the retarded self-energy for electron-phonon scattering are analyzed in terms of the electrostatics, current and computational cost.

Tip-Enhanced Raman Imaging and Nano Spectroscopy of Etched Silicon Nanowires

Tip-enhanced Raman spectroscopy (TERS) is used to investigate the influence of strains in isolated and overlapping silicon nanowires prepared by chemical etching of a (100) silicon wafer. An atomic force microscopy tip made of nanocrystalline diamond coated with a thin layer of silver is used in conjunction with an excitation wavelength of 532 nm in order to probe the first order optical phonon...

Surface-decorated silicon nanowires: a route to high-ZT thermoelectrics.

Based on atomistic calculations of electron and phonon transport, we propose to use surface-decorated silicon nanowires for thermoelectric applications. Two examples of surface decorations are studied to illustrate the underlying ideas: nanotrees and alkyl functionalized silicon nanowires. For both systems we find (i) that the phonon conductance is significantly reduced compared to the electron...

Atomistic simulation of phonon and alloy limited hole mobility in Si1−xGex nanowires

The role of alloy and phonon scattering is theoretically explored in 5 nm diameter SiGe nanowires at room temperature. Low field mobility calculations are performed by utilizing sp3d5ds∗-spin-orbit-coupled tight binding model for electronic structure and Boltzmann transport formalism. Three different transport orientations <100>, <110> and <111> are considered. Alloy scattering is found to play...