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

被引：3

作者：

Bussetti, G. ^{[1
,2
]}

Violante, A. ^{[1
,2
]}

Bonanni, B. ^{[1
,2
]}

Cirilli, S. ^{[1
,2
]}

Goletti, C. ^{[1
,2
]}

Chiaradia, P. ^{[1
,2
]}

Chiarotti, G. ^{[1
,2
]}

Rohlfing, M. ^{[3
]}

机构：

[1] Univ Roma Tor Vergata, Dipartimento Fis, NAST, I-00173 Rome, Italy

[2] Univ Roma Tor Vergata, CNISM, I-00173 Rome, Italy

[3] Univ Osnabruck, Fachbereich Phys, D-4500 Osnabruck, Germany

来源：

PHYSICAL REVIEW B | 2010年 / 82卷 / 15期

关键词：

EXCITONS; OXYGEN;

D O I：

10.1103/PhysRevB.82.153304

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页数：4

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