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ELECTRONIC PROPERTIES OF CALCIUM ULTRATHIN LAYERS ONCu(111): A HIGH-RESOLUTION ELECTRON ENERGY LOSS SPECTROSCOPY STUDY

Antonio Politano ()
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Antonio Politano: Universidad Autónoma de Madrid, Departamento de Fisica de la Materia, Condensada, Campus de Cantoblanco, 28049 Madrid, Spain

Surface Review and Letters (SRL), 2010, vol. 17, issue 04, 411-417

Abstract: The electronic properties of aCabilayer deposited onCu(111)have been investigated by high-resolution electron energy loss spectroscopy. For the as-depositedCabilayer, the surface plasmon was recorded at 3.3eV. Temperature induces a surface metal-insulator transition (evidenced by the shift of the surface plasmon energy), leading to the formation ofCaOthin layers which are highly reactive towards water molecules. The presence of occupied d band in the calcium overlayer modifies surface plasmon frequency and strongly influences its dispersion relation. Results are well explained within the framework of the s-d polarization theory.

Keywords: Electron energy loss spectroscopy; calcium; surface plasmon (search for similar items in EconPapers)
Date: 2010
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DOI: 10.1142/S0218625X10014181

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