Optical experiments on the Si(111)-2x1 surface show that the absorption peak due to dangling-bond transitions exhibits a blueshift upon oxygen exposure. The effect is interpreted as due to quantum confinement of surface electrons in pi-bonded chains of atoms, whose length decreases with oxygen uptake (a particle-in-a-box effect, the box being one dimensional). This conlusion is suported by numerical simulation of the optical spectra.
Optical absorption measurements of electron quantum confinement in Si(111)-2×1 surface chains
BUSSETTI, GIANLORENZO;
2010-01-01
Abstract
Optical experiments on the Si(111)-2x1 surface show that the absorption peak due to dangling-bond transitions exhibits a blueshift upon oxygen exposure. The effect is interpreted as due to quantum confinement of surface electrons in pi-bonded chains of atoms, whose length decreases with oxygen uptake (a particle-in-a-box effect, the box being one dimensional). This conlusion is suported by numerical simulation of the optical spectra.File in questo prodotto:
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