Fig. 2

(a) Band structure and spin-resolved density of states of 4aaZχ BNR. The inset illustrates its geometrical configuration. (b) The density of α, β and α-β (net spin) electronic states of 4aaZχ BNR. (c) Fat band structure of 4aaZχ BNR. The subbands around the Fermi level are labeled 1—5.