Figure 2
From: Quantum valley Hall effect in wide-gap semiconductor SiC monolayer
DFT calculations for SiC monolayer. (a) Bulk band structure. (b) Berry curvature map. The bright and dark spots correspond to positive and negative Berry curvature, respectively. b1 and b2 represent reciprocal lattice vectors. K+ and K− correspond to the opposite valleys. (c,c1,c2) and (d,d1,d2) Correspond to spin-restricted and spin-unrestricted calculations for H-terminated 32-ZNR, respectively. (c,d) show the band structures. (c1,d1) Show the square of the wavefunction ∣Ψ∣2 at EF. (c2,d2) Show schematics for the propagating states at EF. The red and blue colors represent the opposite spins. The up and down arrows correspond to the opposite propagating directions. The solid and dashed arrows represent the opposite valleys.
