Structure and quantum well states in silicene nanoribbons on Ag(110)

SURFACE SCIENCE

卷:645

Article

Feng, Baojie¹  Li, Hui¹  Meng, Sheng^1,2  Chen, Lan¹  Wu, Kehui^1,2 

[1] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[2] Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China

关键词: Scanning tunneling microscopy;    First-principles calculations;    Silicene;    Nanoribbon;    Armchair;    Quantum well states;   

DOI  :  10.1016/j.susc.2015.10.037

来源: Elsevier

【 摘 要 】

We have performed scanning tunneling microscopy/spectroscopy (STM/STS) study and first-principles calculations to investigate the atomic structure and electronic properties of silicon nanoribbons (SiNRs) grown on Ag(110). Despite the extensive research on SiNRs in the last decades, its atomic structure is still not fully understood so far. In this report we determine that the structure of SiNRs/Ag(110) is armchair silicene nanoribbon with reconstructed edges. Meanwhile, pronounced quantum well states (QWS) in SiNRs were observed and their energy spectrum was systematically measured. The QWS are due to the confinement of quasiparticles perpendicular to the nanoribbon and can be well explained by the theory of one-dimensional (1D) particle-in-a-box model in quantum mechanics. (C) 2015 Published by Elsevier B.V.

【 授权许可】

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