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DPG

Dresden 2009 – scientific programme

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O: Fachverband Oberflächenphysik

O 6: Electronic structure I

O 6.4: Talk

Monday, March 23, 2009, 12:00–12:15, SCH A216

Interplay between electronic states and structure during Au faceting — •Frederik Schiller1, Martina Corso2, Javier Cordón3, Javier García de Abajo4, and Enrique Ortega1,2,31Unidad de Física de Materiales CSIC/UPV, Manuel Lardizábal 3, E-20018 San Sebastián, Spain — 2DIPC, Manuel Lardizábal 4, E-20018 San Sebastián, Spain — 3Dpto. Física Aplicada I, Universidad del País Vasco, Plaza Oñate 2, E-20018 San Sebastián, Spain — 4Instituto de Óptica-CSIC, Serrano 121, E-28006 Madrid, Spain

Au(111) vicinal surfaces are characteristic examples of two-phase segregation or faceting. Between ∼ 4 and 9.5 miscut, the surface exhibits hill-and-valley structures formed by bunches of relatively wide (dw∼ 36-41 Å) and narrow (dn∼ 14 Å) terraces. The evolution of surface electronic states in such a faceted system is followed using a curved crystal. Beyond 4 the surface state splits into distinct dw and dn bands. Our analysis suggests the crucial role of surface states in defining the characteristic dw and dn sizes during Au faceting.

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