Fig. 2.

Energy dispersion of the bulk electronic states. Shown here is the energy vs. wave vector k along a high-symmetry path in the BZ, defined in Fig. 1C. The bottom four bands near $E_F$ show a strong reduction in the bandwidth. The bare parameters are $(t,\lambda ,m,E_d,V)=(1,0.5,1,-6,6.6)$. In the self-consistent solution, $r\simeq 0.259$ and $\mathrm{\ell }\simeq 6.334$.