Topological Band Theory — SSH Model

The Su-Schrieffer-Heeger (SSH) model: a 1D chain with alternating hopping amplitudes v (intra-cell) and w (inter-cell). When |w| > |v|, the system is topologically non-trivial with protected edge states at zero energy.

v (intra-cell): 0.50 w (inter-cell): 1.50 Chain length N: 20

Phase: TOPOLOGICAL Winding number: 1 | |v/w| = 0.33 | Band gap: —