Topwal, D and Unnikrishnan, Manju and Pacile, D and Papagno, M and Wortmann, D and Bihlmayer, G and Bluegel, S. and Carbone, C. (2012) Quantum electron confinement in closely matched metals: Au films on Ag(111). Physical Review B, 86 (8). Article No-085419. ISSN 1098-0121

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We examined by two-dimensional photoemission band mapping the electronic structure of Au films epitaxially grown on an Ag(111) substrate. The very similar structural and electronic properties of the two metals make this system extremely unfavorable for the occurrence and observation of electron confinement effects. At variance with previous spectroscopic studies, we show that the electron reflectivity at the interface sustains the formation of well-defined sp-derived quantum well states (QWS) and weak quantum well resonance states (QWRS) in the Au layers. The character and degree of confinement of these states are analyzed and quantitatively related to the Au/Ag interface reflectivity on the basis of density functional theory (DFT) band structure calculations.

Item Type: Article
Subjects: Engineering Materials
Depositing User: Bidhan Chaudhuri
Date Deposited: 01 Nov 2012 08:32
Last Modified: 01 Nov 2012 08:32

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