Table 1 |
||||||
|
Four Dirac cones of BHZ model on square lattice |
||||||
|
Dirac Points (DP) |
Γ |
X1 |
X2 |
M |
|
∏DPδDP |
|
|
||||||
|
|
(0, 0) |
(0, π/a) |
(π/a, 0) |
(π/a, π/a) |
||
|
|
||||||
|
Mass gap |
Δ |
Δ - 4B |
Δ - 4B |
Δ - 8B |
||
|
|
||||||
|
Chirality χ |
+ |
- |
- |
+ |
||
|
|
||||||
|
Δ < 0 |
- (p) |
+ (s) |
+ (s) |
- (p) |
0 |
+1 |
|
0 < Δ < 4B |
+ (s) |
+ (s) |
+ (s) |
- (p) |
2e2/h |
-1 |
|
4B < Δ < 8B |
+ (s) |
- (p) |
- (p) |
- (p) |
-2e2/h |
-1 |
|
8B < Δ |
+ (s) |
- (p) |
- (p) |
+ (s) |
0 |
+1 |
|
|
||||||
|
Imura et al. Nanoscale Research Letters 2011 6:358 doi:10.1186/1556-276X-6-358 |
||||||
= (kx, ky) at the DP
