Polaron formation dynamics in conducting polymers
| Autor: | Shijie Xie, Xiao-jing Liu, Yuan Li, JianHua Wei, Ji-yong Fu, Kun Gao |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Condensed Matter::Quantum Gases
chemistry.chemical_classification Conductive polymer Lattice energy Condensed matter physics Mechanical Engineering Doping Metals and Alloys Polymer Electron Condensed Matter Physics Critical value Polaron Electronic Optical and Magnetic Materials chemistry Mechanics of Materials Lattice (order) Materials Chemistry Condensed Matter::Strongly Correlated Electrons |
| Zdroj: | Synthetic Metals. 157:380-385 |
| ISSN: | 0379-6779 |
| DOI: | 10.1016/j.synthmet.2007.04.008 |
| Popis: | In the framework of the extended Su–Schrieffer–Heeger model, the formation mechanism of a polaron is studied by calculating the interaction force between a hot electron and the lattice in a conducting polymer. It is found that the formation of a polaron depends upon the energy of the hot electron. Regardless of whether an electron comes from an injection, doping or a dissociated state of a polaron, it will be trapped by the lattice to form a polaron only when its energy is lower than a critical value. The force field between the lattice and the hot electron with a lower energy has a localized characteristic, which causes polaron formation in a conducting polymer. For a hot electron with much higher energy, the force field is extended over the whole polymer chain, which cannot trap the electron and therefore a polaron does not form in this case. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect