Quasi-degenerate self-trapping in one-dimensional charge transfer exciton

Details Quasi-degenerate self-trapping in one-dimensional charge transfer exciton Quasi-degenerate self-trapping in one-dimensional charge transfer exciton

2001-03-27

arxiv.org/abs/cond-mat/0103551v1

Phys. Rev. Lett., vol. 86, p. 4624 (2001)

Physics

Condensed Matter

Strongly Correlated Electrons

accepted to Phys. Rev. Letters

Scientific paper

10.1103/PhysRevLett.86.4624

The self-trapping by the nondiagonal particle-phonon interaction between two quasi-degenerate energy levels of excitonic system, is studied. We propose this is realized in charge transfer exciton, where the directions of the polarization give the quasi-degeneracy. It is shown that this mechanism, unlike the conventional diagonal one, allows a coexistence and resonance of the free and self-trapped states even in one-dimensional systems and a quantitative theory for the optical properties (light absorption and time-resolved luminescence) of the resonating states is presented. This theory gives a consistent resolution for the long-standing puzzles in quasi-one-dimensional compound A-PMDA.

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