Optical absorption measurements of electron quantum confinement in Si(111)-2x1 surface chains

Autor(en): Bussetti, G.
Violante, A.
Bonanni, B.
Cirilli, S.
Goletti, C.
Chiaradia, P.
Chiarotti, G.
Rohlfing, M.
Stichwörter: EXCITONS; Materials Science; Materials Science, Multidisciplinary; OXYGEN; Physics; Physics, Applied; Physics, Condensed Matter
Erscheinungsdatum: 2010
Herausgeber: AMER PHYSICAL SOC
Journal: PHYSICAL REVIEW B
Volumen: 82
Ausgabe: 15
Zusammenfassung: 
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.
ISSN: 24699950
DOI: 10.1103/PhysRevB.82.153304

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