Interplay between electronic and structural properties in the Pb/Ag(1 0 0) interface. (22nd October 2015)

• Record Type: Journal Article
• Authors: Crepaldi, A; Zhan, R R; Moser, S; Sheverdyaeva, P M; Carbone, C; Papagno, M; Moras, P; Baraldi, A; Grioni, M
• Is Part Of: Journal of physics. Volume 27:Number 45(2015)
• Publication Date: 2015-10-22
• Subjects: two-dimensional system -- surface interface -- angle-resolved photoelectron spectroscopy -- x-ray photoelectron diffraction; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/0953-8984/27/45/455502
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: We report an investigation of the structural and electronic properties of a Pb monolayer (ML) grown on Ag(1 0 0), by combining x-ray photoelectron diffraction (XPD) and angle resolved photoelectron spectroscopy (ARPES). The Pb atoms are found to arrange in a pseudo-hexagonal adlayer commensurate to the underlying square Ag substrate, resulting in a coincidence cell with c( ) periodicity. The electronic structure of the Pb ML in proximity of the Fermi level consists in three p -derived bands, which show different degrees of hybridization with the substrate for their different orbital characters. In particular, we report that the p xy states disperse without forming energy gap, in contrast to previous ARPES studies of the Pb ML on different metallic substrates. We attribute the absence of energy gap to the commensurability between substrate and adlayer, resulting in a higher two-dimensionality of the Pb ML.