Polaron Dynamics with Impurities in Conjugated Polymers
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Sociedade Brasileira de Física
2005
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| _version_ | 1876422950744227840 |
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| author | M. P. Lima |
| author_facet | M. P. Lima |
| contents | Polaron Dynamics with Impurities in Conjugated Polymers M. P. Lima G. M. e Silva Física, Astronomía y Matemáticas We study the charge transport by polarons in conjugated polymers in the presence of impurities. The effects onthe polaron motion due to the symmetry of the chain is considered. The polaron dynamics in doped conjugatedpolymers is numerically studied using the Su-Schrieffer-Heeger (SSH) model combined with the Pariser-Parr-Pople (PPP) model modified to include an external electric field and the Brazovskii-Kirova (BK) symmetrybreaking interaction. The time dependent Hartree-Fock approximation is used. The electric field is used toaccelerate the polaron in a polymer chain. Polaron trapped by the impurity and polaron-impurity collisionsare considered. When the polaron-structure is around the impurity site a charge oscillation can be observed.Nevertheless, when there are collisions between the polaron and the impurity, the polaron-structure can pass, betrapped or be reflected. These effects are determined by the strength of the radical parameter and by the electricfield intensity. The effects on the polaron are analyzed and an effective potential is determined. Therefore, theeffective potential determines the polaron behavior for each case, as the polaron pass, or it is trapped or reflectedby an impurity. 2005 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46435609 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.4A Vol.35 |
| format | Artículo científico |
| id | redalyc_46435609 |
| institution | Redalyc |
| language | en |
| publishDate | 2005 |
| publisher | Sociedade Brasileira de Física |
| spellingShingle | Polaron Dynamics with Impurities in Conjugated Polymers M. P. Lima Física, Astronomía y Matemáticas Polaron Dynamics with Impurities in Conjugated Polymers M. P. Lima G. M. e Silva Física, Astronomía y Matemáticas We study the charge transport by polarons in conjugated polymers in the presence of impurities. The effects onthe polaron motion due to the symmetry of the chain is considered. The polaron dynamics in doped conjugatedpolymers is numerically studied using the Su-Schrieffer-Heeger (SSH) model combined with the Pariser-Parr-Pople (PPP) model modified to include an external electric field and the Brazovskii-Kirova (BK) symmetrybreaking interaction. The time dependent Hartree-Fock approximation is used. The electric field is used toaccelerate the polaron in a polymer chain. Polaron trapped by the impurity and polaron-impurity collisionsare considered. When the polaron-structure is around the impurity site a charge oscillation can be observed.Nevertheless, when there are collisions between the polaron and the impurity, the polaron-structure can pass, betrapped or be reflected. These effects are determined by the strength of the radical parameter and by the electricfield intensity. The effects on the polaron are analyzed and an effective potential is determined. Therefore, theeffective potential determines the polaron behavior for each case, as the polaron pass, or it is trapped or reflectedby an impurity. 2005 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46435609 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.4A Vol.35 |
| title | Polaron Dynamics with Impurities in Conjugated Polymers |
| topic | Física, Astronomía y Matemáticas |
| url | https://www.redalyc.org/articulo.oa?id=46435609 |