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 conclusion is supported by numerical simulation of the optical spectra.
Bussetti, G., Violante, A., Bonanni, B., Cirilli, S., Goletti, C., Chiaradia, P., et al. (2010). Optical absorption measurements of electron quantum confinement in Si(111)-2x1 surface chains. PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS, 82(15), 153304-153308 [10.1103/PhysRevB.82.153304].
Optical absorption measurements of electron quantum confinement in Si(111)-2x1 surface chains
BUSSETTI, GIANLORENZO;BONANNI, BEATRICE;GOLETTI, CLAUDIO;CHIARADIA, PIETRO;CHIAROTTI, GIANFRANCO;
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 conclusion is supported by numerical simulation of the optical spectra.| File | Dimensione | Formato | |
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