Circular dichroism in photoemission as a fingerprint of surface band structure: The case of ZnSe(001)-c(2x2)

Franck Vidal (1) , M. Marangolo (1) , P. Torelli (2) , M. Eddrief (1) , M. Mulazzi , G. Panaccione (3)

1 INSP - Institut des Nanosciences de Paris
2 CNR Istituto Officina dei Materiali
3 TASC - Laboratory TASC

Measurements of circular dichroism in the angular dependence (CDAD) of photoemission from core levels and valence bands of the ZnSe(001)-c(2x2) surface are presented. Due to the lowering of the surface symmetry compared to the bulk, the CDAD of surface-related spectral components and of bulk components exhibit different polar variations. We propose a way to identify experimentally surface-related bands in the valence-band photoemission spectra based on these symmetry considerations.

Domaines: Matière Condensée [cond-mat]

Franck Vidal, M. Marangolo, P. Torelli, M. Eddrief, M. Mulazzi, et al.. Circular dichroism in photoemission as a fingerprint of surface band structure: The case of ZnSe(001)-c(2x2). Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2007, 76 (8), pp.081302. ⟨10.1103/PhysRevB.76.081302⟩. ⟨hal-01293144⟩