Interpretation of photoemission from Na (1 1 0) |
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Institution: | 1. Composites Materials Group (CENM), School of Materials Engineering, Universidad del Valle, Cali, Colombia;2. Nino Research Group, Materials Science and Engineering, University of Florida, Gainesville, USA |
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Abstract: | A self-consistent calculation of the electronic structure of the Na (1 1 0) surface, using an embedding method to treat the semi-infinite system, gives a prominent surface resonance peak at 0.75 eV above the Fermi energy. The tail of this resonance extends below EF at the surface, and it is suggested that surface photoemission from this tail is responsible for the peak in the photocurrent at EF observed experimentally, A photoemission calculation, with a non-self-consistent surface potential, reproduces the enhancement of the peak as a direct transition moves through it. |
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