Exploring the universality of the alternating conductivity of disordered materials using the Gaussian distribution of activation energies.

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorCouto, Jullianna Dénes-
Autor(es): dc.creatorSantos, Mirela de Castro-
Autor(es): dc.creatorBianchi, Rodrigo Fernando-
Data de aceite: dc.date.accessioned2025-08-21T15:27:47Z-
Data de disponibilização: dc.date.available2025-08-21T15:27:47Z-
Data de envio: dc.date.issued2019-06-10-
Data de envio: dc.date.issued2019-06-10-
Data de envio: dc.date.issued2019-
Fonte completa do material: dc.identifierhttp://www.repositorio.ufop.br/handle/123456789/11508-
Fonte completa do material: dc.identifierhttps://iopscience.iop.org/article/10.1088/2053-1591/aad1ce/meta-
Fonte completa do material: dc.identifierhttps://doi.org/10.1088/2053-1591/aad1ce-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1015654-
Descrição: dc.descriptionThis paper presents a newapproach for the analysis of ACconductivity, s*(w)= s¢(w)+is(w), in disordered solids which brings together the quasi-universal frequency-dependent conductivity and the idea of a Gaussian distributions of probable activation energy barriers for hopping carriers. An explicit expression forAC conductivity was obtained using a complex dielectric response function and a continuous time random walk treatment applied to a lattice obeying the Kubo’s fluctuationdissipation theorem. This expression provides an insight into the universality of the form s¢(w) μ ws (0  s  1) and s(w) μ kw (k is the dielectric constant), aswell into the effect of the Gaussian disorder on exponent s.We discuss the similarities and differences with the Random Free Energy Barrier model equivalent to the long-used box model, and it brings support to an extending expression proposed by JCDyre and one of the authors. The applicability of the model to experimental observations on poly[(2-methoxy-5-hexyloxy)-p-phenylenevinylene] reveals the dielectric constant, mean energy and variance of the Gaussian distribution for hopping carriers in this disordered conjugated polymer.-
Formato: dc.formatapplication/pdf-
Idioma: dc.languagept_BR-
Direitos: dc.rightsrestrito-
Palavras-chave: dc.subjectHopping transport-
Palavras-chave: dc.subjectOrganic semiconductors-
Palavras-chave: dc.subjectConductivity phenomena in semiconductor-
Título: dc.titleExploring the universality of the alternating conductivity of disordered materials using the Gaussian distribution of activation energies.-
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