Excitation of 2D plasmons in a Cs/W(110) system |
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| Authors: | G V Benemanskaya K E Rovinskii G É Frank-Kamenetskaya |
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| Institution: | (1) Ioffe Physicotechnical Institute, Russian Academy of Sciences, Politekhnicheskaya ul. 26, St. Petersburg, 194021, Russia;(2) St. Petersburg Institute of Technology, Zagorodnyi pr. 49, St. Petersburg, 198013, Russia |
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| Abstract: | The evolution of surface photoemission spectra was investigated for a Cs/W(110) system with metastable Cs coatings larger than a monolayer. It is demonstrated that 2D plasmons can be detected by threshold photoemission spectroscopy. Three photoemission peaks were observed, whose dependence on the Cs adsorption dose showed a complicated behavior. The peaks may be due to the photoinduced excitation of a plasmon in quasi-2D Cs clusters, a surface Cs plasmon, or an interface Cs-W plasmon. |
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