## Stability of ZnO Polar Surfaces

*ab initio* calculations have been performed to investigate
the stability of the (0001) and (000-1) surfaces of ZnO. One possible
stabilisation mechanism is the transfer of charge between the two
surfaces leading to a metallisation of the Zn surface and holes
in the *2p* band on the oxygen surface.

This work appeared in *A. Wander, F. Schedin, P. Steadman, A. Norris,
R. McGrath, T.S. Turner, G.Thornton, N. M. Harrison * ** The Stability of
Polar Oxide Surfaces ** Physical Review Letters 86 p.3811 (2001)