Inhaltspezifische Aktionen

April

Bild des Monats April 2019

Hier finden Sie wechselnde Einblicke in die Arbeiten der am LaMa beteiligten Arbeitsgruppen. Eine Sammlung aller bisher erschienenen Bilder finden sie in der Galerie der Bilder des Monats.

How One-Dimensional Are Atomic Gold Chains on a Substrate?

One-dimensional (1D) wires are inherently unstable but can be stabilized by three-dimensional (3D) interaction with their environment, resulting in two-dimensional (2D) and 3D hybridization of 1D electronic states. The relevance of these interactions, is exemplified by the prototypical Si(553)–Au system, which forms double atomic 1D chains on each mini-terrace. The combined approach consisting of plasmon spectroscopy and first-principles calculations demonstrates the relevance of hybridization, leading to the complete breakdown of the nearly free electron gas model. Due to the coupling of the Au wires with higher dimensions through the substrate, the wires are more appropriately described as an extremely anisotropic 2D object than as purely 1D.

Publication:

Dieses Bild wurde eingereicht von Prof. Dr. Simone Sanna.