Three-dimensional Bernal graphite

Figure 15-33 (a) The FBZ and RFBZ for three-dimensional Bernal graphite, (b) View of the... 

Let us see if we can predict the modifications in energies of COs that should occur at some of the special points in the RFBZ as a result of intersheet interactions. Because three-dimensional Bernal graphite is symmetric for reflection through the plane of a hexagonal sheet, we continue to have a valid distinction between a and n COs. We expect intersheet interactions to be small, so we can take a perturbational approach. The interactions involving jt COs should be largest since p AOs project farthest from the plane, so we will restrict our attention to the n bands. 

Fig. 1 Atomic structures of graphites, a) Bernal structure of perfect three-dimensional graphite, b) Warren structure of two-dimensional turbostatic graphite with no layer registration. (Reproduced by kind permission of Thermo-Hypersil-Keystone.)...

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