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Abstract:
The GaAs (113)A surface was prepared by molecular beam epitaxy and investigated in situ by means of low-energy electron diffraction, surface core level spectroscopy and angle-resolved valence band photoemission. One stable, (8×1) reconstructed surface was prepared. Surface core level shifts were observed for As 3d (530 meV) and Ga (-460 meV, 360meV) which support a recently proposed model [1]. Two surface resonances were observed at -1.1 and -3.7 eV below the valence band maximum.