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Published in: Journal of Physics: Condensed Matter (ISSN: 1361-648X), vol. 24, num. 33, p. 335502 Bristol: Iop Publishing Ltd, 2012

We examined by low-energy electron diffraction and scanning tunneling microscopy the surface of thin Cu films on Pt(111). The Cu/Pt lattice mismatch induces a moire modulation for films from 3 to about 10 ML thickness. We used angle-resolved photoemission spectroscopy to examine the effects of this structural modulation on the electronic states of the system. A series of hexagonal- and trigonal-like constant energy contours is found in the proximity of the Cu(111) zone boundaries. These electronic patterns are generated by Cu sp-quantum well state replicas, originating from multiple points of the reciprocal lattice associated with the moire superstructure. Layer-dependent strain relaxation and hybridization with the substrate bands concur to determine the dispersion and energy position of the Cu Shockley surface state.

Reference EPFL-ARTICLE-180199doi:10.1088/0953-8984/24/33/335502View record in Web of Science





Author: Moras, P.; Sheverdyaeva, P. M.; Carbone, C.; Topwal, D.; Ferrari, L.; Bihlmayer, G.; Ouazi, S.; Rusponi, S.; Lehnert, A.; Brune, H

Source: https://infoscience.epfl.ch/record/180199?ln=en



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