Controlling the Local Electronic Properties of Si(553)-Au through Hydrogen Doping.
Phys Rev Lett
; 120(16): 166801, 2018 Apr 20.
Article
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| MEDLINE
| ID: mdl-29756924
ABSTRACT
We propose a quantitative and reversible method for tuning the charge localization of Au-stabilized stepped Si surfaces by site-specific hydrogenation. This is demonstrated for Si(553)-Au as a model system by combining density functional theory simulations and reflectance anisotropy spectroscopy experiments. We find that controlled H passivation is a two-step process step-edge adsorption drives excess charge into the conducting metal chain "reservoir" and renders it insulating, while surplus H recovers metallic behavior. Our approach illustrates a route towards microscopic manipulation of the local surface charge distribution and establishes a reversible switch of site-specific chemical reactivity and magnetic properties on vicinal surfaces.
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MEDLINE
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En
Revista:
Phys Rev Lett
Año:
2018
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Article
País de afiliación:
Italia