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arXiv · 1102.1056

Creating and modulating electronic states on noble metal surfaces: ultrathin Ag islands on Si(111)-7$\times$7 as a prototype

Fang Cheng·Xiong Zhou·Yang He·Qian Shen·Hailing Liang·Heng Li·Jianlong Li·Wei Ji·Kai Wu
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Abstract

Various-thickness Ag islands were prepared on Si(111)-7$\times$7 using the one-step deposition at a high substrate temperature. An electronic state centered at -0.40$\sim$-0.15eV versus E$_{Fermi}$, detectable on the surface of the Ag islands thinner than 9 layers, was created by the electronic hybridization between Ag and Si at the Ag-Si interface. Scanning tunneling microscopy/spectroscopy and density functional theory revealed that the thickness of Ag islands determined the strength of the hybridization, leading to a modulation to the energy and intensity of the state on the surface.

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Fang Cheng, Xiong Zhou, Yang He, Qian Shen, Hailing Liang, Heng Li, Jianlong Li, Wei Ji, Kai Wu. 2011-02-05. Creating and modulating electronic states on noble metal surfaces: ultrathin Ag islands on Si(111)-7$\times$7 as a prototype. https://arxiv.org/abs/1102.1056

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