The electronic structure of Be(10(1)over-bar-0)

We measured the surface state dispersions on Be(<10(1)over bar 0>) by angle-resolved photoemission (ARUPS) and calculated the electronic structure for both possible terminations of the bulk crystal from first principles. The experimental data agrees only viith the prediction for the termination with the shorter first interlayer spacing. This is also supported by a comparison between our calculation of the surface core-level shift spectrum with the experimental data from Johansson et al. However, in contrast to their interpretation, our calculation predicts a larger surface core level shift for second-layer Be atoms than for first-layer atoms.