Coupling a trivial tight-binding leg to an SSH leg expands the topological phase with zero-energy edge modes in the ladder, characterized by quantized Berry phase with analytically determined boundaries.
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Topological phase and its effective tuning in a ladder lattice
Coupling a trivial tight-binding leg to an SSH leg expands the topological phase with zero-energy edge modes in the ladder, characterized by quantized Berry phase with analytically determined boundaries.