The 3D unoccupied band structure of graphite by very-low-energy electron diffraction

The three-dimensional 3D.effects critically influence the physical properties of graphite. These effects in unoccupied bands are studied by very-low-energy electron diffraction VLEED.. The position and dispersion of the 3D bands coupling to vacuum, including the interlayer state, are determined. The data are compared to a state-of-the-art DFT band calculation. The non-free-electron and self-energy effects are assessed. q2000 Elsevier Science B.V. All rights reserved.