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

Simple item page
dc.contributor.authorCouto, Jullianna Dénes
dc.contributor.authorSantos, Mirela de Castro
dc.contributor.authorBianchi, Rodrigo Fernando
dc.date.accessioned2019-06-10T13:31:23Z
dc.date.available2019-06-10T13:31:23Z
dc.date.issued2019
dc.description.abstractThis 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.pt_BR
dc.identifier.citationCOUTO, J. D.; SANTOS, M. de C.; BIANCHI, R. F. Exploring the universality of the alternating conductivity of disordered materials using the Gaussian distribution of activation energies. Materials Research Express, v. 6, n. 4, p. 1-8, 2019. Disponível em: <https://iopscience.iop.org/article/10.1088/2053-1591/aad1ce>. Acesso em: 19 mar. 2019.pt_BR
dc.identifier.doihttps://doi.org/10.1088/2053-1591/aad1cept_BR
dc.identifier.issn2053-1591
dc.identifier.urihttp://www.repositorio.ufop.br/handle/123456789/11508
dc.identifier.uri2https://iopscience.iop.org/article/10.1088/2053-1591/aad1ce/metapt_BR
dc.language.isopt_BRpt_BR
dc.rightsrestritopt_BR
dc.subjectHopping transportpt_BR
dc.subjectOrganic semiconductorspt_BR
dc.subjectConductivity phenomena in semiconductorpt_BR
dc.titleExploring the universality of the alternating conductivity of disordered materials using the Gaussian distribution of activation energies.pt_BR
dc.typeArtigo publicado em periodicopt_BR
Files
Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
ARTIGO_ExploringUniversalityAlternatig.pdf
Size:
1.18 MB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
924 B
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
DEFIS - Artigos publicados em periódicos