ArticleInternational journal of molecular sciences2022
Resolving the Mechanism of Acoustic Plasmon Instability in Graphene Doped by Alkali Metals.
Article in International journal of molecular sciences, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed.
- Modeling Carbon-Based Nanomaterials (CNMs) and Derived Composites and Devices.Sensors (Basel, Switzerland) · 2024Review
- Quantum-Size Effects in Ultra-Thin Gold Films on Pt(111) Surface.Materials (Basel, Switzerland) · 2023Article
- Launching Plasmons in a Two-Dimensional Material Traversed by a Fast Charged Particle.Materials (Basel, Switzerland) · 2023Article
- Carbon-Based Nanomaterials 3.0.International journal of molecular sciences · 2022Article
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6 authors.
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Abstract
Graphene doped by alkali atoms (ACx) supports two heavily populated bands (π and σ) crossing the Fermi level, which enables the formation of two intense two-dimensional plasmons: the Dirac plasmon (DP) and the acoustic plasmon (AP). Although the mechanism of the formation of these plasmons in electrostatically biased graphene or at noble metal surfaces is well known, the mechanism of their formation in alkali-doped graphenes is still not completely understood. We shall demonstrate that two isoelectronic systems, KC8 and CsC8, support substantially different plasmonic spectra: the KC8 supports a sharp DP and a well-defined AP, while the CsC8 supports a broad DP and does not support an AP at all. We shall demonstrate that the AP in an ACx is not, as previously believed, just a consequence of the interplay of the π and σ intraband transitions, but a very subtle interplay between these transitions and the background screening, caused by the out-of-plane interband C(π)→A(σ) transitions.
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