The band structures near the Fermi level. (a) α-a , (b) α-b , (c) α-c , (d) β-a , (e) β-b , and (f) β-c . For (c) and (f), the left and right respectively represent the bands of spin-up and spin-down electrons. The dashed lines represent the Fermi level EF.
Li et al. Nanoscale Research Letters 2012 7:678 doi:10.1186/1556-276X-7-678