Counting the number of excited states in organic semiconductor systems using topology.


Exciton scattering theory attributes excited electronic states to standing waves in quasi-one-dimensional molecular materials by assuming a quasi-particle picture of optical excitations. The quasi-particle properties at branching centers are described by the corresponding scattering matrices. Here, we identify the topological invariant of a scattering… (More)
DOI: 10.1063/1.4908560


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