Charge carrier scattering in polymers : a new neutral coupled soliton channel
I tiakina i:
| Kaituhi matua: | |
|---|---|
| Rā whakaputa: | 2018 |
| Ētahi atu kaituhi: | , , |
| Hōputu: | Article |
| Reo: | eng |
| Puna: | Repositório Institucional da UnB |
| Download full: | http://repositorio.unb.br/handle/10482/33808 https://dx.doi.org/10.1038/s41598-018-24948-1 |
Whakarāpopototanga: | The dynamical scattering of two oppositely charged bipolarons in non-degenerate organic semiconducting lattices is numerically investigated in the framework of a one-dimensional tight-biding–Hubbard model that includes lattice relaxation. Our findings show that it is possible for the bipolaron pair to merge into a state composed of a confined soliton-antisoliton pair, which is characterized by the appearance of states within less than 0.1 eV from the Fermi level. This compound is in a narrow analogy to a meson confining a quark-antiquark pair. Interestingly, solitons are quasi-particles theoretically predicted to arise only in polymer lattices with degenerate ground state: in the general case of non-degenerate ground state polymers, isolated solitons are not allowed. |