Observation of the topological soliton state in the Su–Schrieffer–Heeger model
Observation of the topological soliton state in the Su–Schrieffer–Heeger model
The Su-Schrieffer-Heeger (SSH) model, which captures the most striking transport properties of the conductive organic polymer $trans$-polyacetylene, provides perhaps the most basic model system supporting topological excitations. The alternating bond pattern of polyacetylene chains is captured by the bipartite sublattice structure of the SSH model, emblematic of one-dimensional chiral symmetric …