Topological Band Gap — SSH Model
Su-Schrieffer-Heeger chain: topology, edge states, and band inversion
SSH Chain Parameters
Intracell hopping v:
0.5
Intercell hopping w:
1.5
Chain length N:
20
TOPOLOGICAL PHASE
Winding number:
1
Band gap:
—
|v| < |w| → topological (winding = 1)
|v| > |w| → trivial (winding = 0)
Edge states appear at zero energy in the topological phase (red dots).