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.
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页数：4
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