Electronic Structures and Surface States of ZnO Finite Well Structures
Electronic band structures and surface states were investigated for ZnO finite wells or slabs grown along <0001> and <1-100> directions using tight binding representation. The dangling bonds on two end-surfaces caused surface bands for different directions grown slabs, of which the wavefunctions tend to localize at the end surfaces. The increasing splitting of the degenerate surface bands at the Γ point was observed decreasing with the thickness of the nonpolar [1-100] slab. And, the quantum confinement effect is distinctively enhanced by the extra electron-field induced in the <0001> grown finite well with the polar end-surfaces.
K. F. Lin and W. F. Hsieh, "Electronic Structures and Surface States of ZnO Finite Well Structures", Solid State Phenomena, Vol. 151, pp. 208-212, 2009