Abstract
A band-theory method is presented for the calculation of image states on a metal surface. It is modified from the film linearized augmented-plane-wave method for surface-electronic-structure calculations. A nonlocal exchange-correlation potential is incorporated to correct the long-range potential beyond the image plane, and a multiple-energy-parameter scheme is used to generate the basis in vacuum. A calculation on Ag(100) yields accurate binding energies, effective masses, and wave functions for the two lowest image states, which agree closely with the available experimental data.
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