Publication

Long-range adsorbate interactions mediated by a two-dimensional electron gas

Klaus Kern, Harald Brune, Maximilian Epple
2002
Journal Articles

Abstract

We report on long-range interactions between adsorbates on metal surfaces with a surface state. A comparison of three adsorbate/substrate systems [Cu/Cu(111), Co/Cu(111), and Co/Ag(111)] suggests the general existence of such interactions and shows up common characteristics. In all cases, the interaction energy E(r) manifests itself up to a distance of 60 Angstrom, decays as 1/r(2), and oscillates with a period of lambda(F)/2. Our data are in excellent agreement with theory and establish the link between the spatial variation of the interaction energy and the adsorbate scattering properties. We demonstrate that the long-range interactions stabilize an ordered two-dimensional (2D) gas of adsorbates and thus create states of dilute 2D matter.

Official source

https://infoscience.epfl.ch/entities/publication/9c1c4606-46ef-4bfa-8e57-cc8022d53bb2

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Klaus Kern, Harald Brune, Maximilian Epple
2002
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/9c1c4606-46ef-4bfa-8e57-cc8022d53bb2

About this result

Related concepts (32)

Surface science

Surface science is the study of physical and chemical phenomena that occur at the interface of two phases, including solid–liquid interfaces, solid–gas interfaces, solid–vacuum interfaces, and liquid–gas interfaces. It includes the fields of surface chemistry and surface physics. Some related practical applications are classed as surface engineering. The science encompasses concepts such as heterogeneous catalysis, semiconductor device fabrication, fuel cells, self-assembled monolayers, and adhesives.

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In physics, the fundamental interactions or fundamental forces are the interactions that do not appear to be reducible to more basic interactions. There are four fundamental interactions known to exist: gravity electromagnetism weak interaction strong interaction The gravitational and electromagnetic interactions produce long-range forces whose effects can be seen directly in everyday life. The strong and weak interactions produce forces at minuscule, subatomic distances and govern nuclear interactions inside atoms.

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Long-range adsorbate interactions mediated by a two-dimensional electron gas

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