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 str ucture for both possible terminations of the bulk crystal from first p rinciples. The experimental data agrees only viith the prediction for the termination with the shorter first interlayer spacing. This is als o supported by a comparison between our calculation of the surface cor e-level shift spectrum with the experimental data from Johansson et al . However, in contrast to their interpretation, our calculation predic ts a larger surface core level shift for second-layer Be atoms than fo r first-layer atoms.