ARPES study of the oxygen-induced reconstructed Cu(332): Surface state confinement

• Published in: Surface science 2013-01, Vol.607, p.107-110
• Main Authors: ViolBarbosa, C.E., Fujii, J., Mikšić Trontl, V., Panaccione, G., Rossi, G.
• Format: Article
• Language: English
• Subjects: ARPES; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Confinement; COPPER ALLOYS (10 TO 40 CU); Cross-disciplinary physics: materials science; rheology; CRYSTAL STRUCTURE; Exact sciences and technology; FORMING; One dimensional; OXYGEN; Photoelectron spectroscopy; Photoemission; Physics; Reconstruction; Surface state; Vicinal surface
• ISSN: 0039-6028; 1879-2758
• DOI: 10.1016/j.susc.2012.06.017

We report the study of the Cu(111) surface state in the vicinal surface Cu(332) after the surface reconstruction induced by oxygen exposure. The reconstructed Cu(332) presents a striped surface consisting of Cu(111) and Cu(110)–O(2×1) facets. The angle resolved photoemission spectroscopy reveals a confinement of the original Cu(111) L-Gap surface state in the region of (111) facets due to the potential at (110)O(2×1) facets, forming a quasi-one dimensional state. ► Surface states in O/Cu(332) are confined in the (111) terraces by the Cu(110)O(2x1) facets forming a quasi 1D system. ► Depletion of states at (110) facets is assigned as one of the scattering mechanism that results in the electron confinement. ► For large (111) terraces, part of photoemitted electrons conserve the parallel momentum with respect the (111) plane.