Dirac cones.

![ The EECs, in-plane spin accumulation directions and out of plane spin accumulation at two representative values of energy in the $\lambda < |\vec{M}|$ regime ( (a) and (b) ) and $\lambda > |\vec{M}|$ regime ( (c) and (d) ) for electric fields applied in the $x$ ( (a) and (c) ) and $y$ ( (b) and (d) ) directions. The sizes on the circles on the EECs are indicative of the magnitudes of the out of plane spin accumulations due to the electric field (the sizes of the circles are *not* scaled linearly to the spin accumulation magnitudes) with green (red) circles indicating out of plane spin accumulations in the negative (positive) $z$ directions. The two dotted circles in the left panels are indicative of the Fermi circles for $\pm +(\vec{k}\times\vec{\sigma})\cdot\hat{z}$ Dirac cones which provide rough indications of the in-plane spin accumulation directions at the $k$ space points on the EECs. $E=1.5R$ for all panels; $\lambda = 0.1, \vec{M} = \hat{y}$ for (a) and (b) and $\lambda = 0.7, \vec{M} = 0.5 \hat{y}$ for (c) and (d). []{data-label="gspinZpoln"}](spinZpoln.eps)

We now turn our attention to the out of plane spin accumulation generated by an electrical field which we 