English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Energy loss spectroscopy (ELS) is a source of information on energies of both surface atom excitations and the electron gas collective oscillations — plasmons. According to the theoretical model [1] the plasmon energy depends on the electron gas density. There are two plasma oscillation frequencies ωb and ωs , the latter is attributed to an abrupt change of the electron density at a surface (surface plasmon), while the former is a frequency of the plasma oscillations in the bulk (volume plasmon). Occurrence of the surface and volume plasmons is connected with a free electron gas of density characteristic of a given metal. A metal deposited on a surface of another metal changes the frequency of the substrate plasmons which is a result of mixing of the electron gas from the substrate and adsorbate. When a density of an electron gas of the adsorbate layer reaches a value attributed to a solid also the plasmons with energy characteristic of the adsorbate should appear [2]. So, for thin layers occurrence of both substrate and adsorbate plasmons is expected as long as the penetration depth of the primary electron beam is larger than the adsorbate thickness. for the lowest coverages θ → 0 when the electron gas of the substrate and adsorbate is mixed [2] the adsorbate plasmons should not be expected, however, in some papers [3-7] such features were reported and interpreted as plasmon losses. Our studies concern the appearance of the plasmon losses of the adsorbate and disappearance of the plasmon losses of the substrate during the adsorbate deposition. We chose the aluminium coverage to our study for its relatively simple electronic stucture, for this metal the free electron model is tue without any exceptions and the excitation energy of the electrons from inner shells is 78 eV or

ELS Study of Ultra Thin Al Layers Deposited on the Mo(110) Face