We report an ab initio investigation of the energy-loss probability of fast electrons in silicon and germanium nanowires. Computed energy loss spectra are characterized by a strong enhancement of the direct interband transitions peak at low energy, in good agreement with experimental data. Our calculations predict an important diameter dependence of the bulk volume plasmon peak for very thin wires which is consistent with the blue shift observed experimentally in thicker wires.
Ab-initio Energy Loss Spectra of Si and Ge Nanowires
Palummo, Maurizia
Primo
;Hogan, Conor;Ossicini, StefanoUltimo
2015
Abstract
We report an ab initio investigation of the energy-loss probability of fast electrons in silicon and germanium nanowires. Computed energy loss spectra are characterized by a strong enhancement of the direct interband transitions peak at low energy, in good agreement with experimental data. Our calculations predict an important diameter dependence of the bulk volume plasmon peak for very thin wires which is consistent with the blue shift observed experimentally in thicker wires.File in questo prodotto:
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Descrizione: Ab initio energy loss spectra of Si and Ge nanowires
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