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Scientific paper - Original scientific paper
Beyond the effective temperature: The electron ensemble at high electric fields in disordered organics
Physical review B: Condensed matter and materials physics, 82 (2010), 16; 165205. https://doi.org/10.1103/PhysRevB.82.165205
Jurić, Ivan; Batistić, Ivo; Tutiš, Eduard

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Jurić, I., Batistić, I. & Tutiš, E. (2010). Beyond the effective temperature: The electron ensemble at high electric fields in disordered organics. Physical review B: Condensed matter and materials physics, 82. (16). doi: 10.1103/PhysRevB.82.165205

Jurić, Ivan, et al. "Beyond the effective temperature: The electron ensemble at high electric fields in disordered organics." Physical review B: Condensed matter and materials physics, vol. 82, no. 16, 2010. https://doi.org/10.1103/PhysRevB.82.165205

Jurić, Ivan, Ivo Batistić and Eduard Tutiš. "Beyond the effective temperature: The electron ensemble at high electric fields in disordered organics." Physical review B: Condensed matter and materials physics 82, no. 16 (2010). https://doi.org/10.1103/PhysRevB.82.165205

Jurić, I., Batistić, I. and Tutiš, E. (2010) 'Beyond the effective temperature: The electron ensemble at high electric fields in disordered organics', Physical review B: Condensed matter and materials physics, 82(16). doi: 10.1103/PhysRevB.82.165205

Jurić I, Batistić I, Tutiš E. Beyond the effective temperature: The electron ensemble at high electric fields in disordered organics. Physical review B: Condensed matter and materials physics [Internet]. 2010 [cited 2024 December 23];82(16). doi: 10.1103/PhysRevB.82.165205

I. Jurić, I. Batistić and E. Tutiš, "Beyond the effective temperature: The electron ensemble at high electric fields in disordered organics", Physical review B: Condensed matter and materials physics, vol. 82, no. 16, 2010. [Online]. Available at: https://urn.nsk.hr/urn:nbn:hr:217:097726. [Accessed: 23 December 2024]

Metadata
Title (english)Beyond the effective temperature: The electron ensemble at high electric fields in disordered organics
AuthorIvan Jurić
AuthorIvo Batistić
AuthorEduard Tutiš
Author's institutionUniversity of Zagreb
Faculty of Science
(Department of Physics)
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Physics
Abstract (english)
Hopping between localized polaronic states, with a Gaussian distribution in energy, is regarded as the main mechanism of electric conduction in disordered organics. Several authors have recently suggested that the hopping electrons, subjected to an electric field, can be described as a homogeneous ‘overheated’ gas, with its “effective temperature” sufficient for a parametrization of the ensemble and the current. It is not clear how such a picture could be reconciled with the observed strongly oriented filamentization of the flow. We show, through extensive numeric simulations, that the picture is misleading as it can overestimate the electron mobility by orders of magnitude. The reason lies in deviations of the average site occupancies from the effective Boltzmann distribution. The ensemble can be described by a distribution function with two parameters—the effective temperature and the variance of the occupancy deviations. The two are connected by a simple universal relation. The spatial structure of the occupancy deviations is found to be connected to the current filaments and its neglect is recognized as the cause for the failure of mobility calculations based on the overheated gas concept. Thus we identify those aspects, lying beyond the overheated gas picture, that are of a fundamental importance to a proper understanding of the transport in disordered organics.
Keywords (english)
Languageenglish
Publication typeScientific paper - Original scientific paper
Publication statusPublished
Peer reviewPeer review - international
Publication versionPublished version
Journal titlePhysical review B: Condensed matter and materials physics
Numberingvol. 82, no. 16, 165205
p-ISSN1098-0121
e-ISSN1550-235X
DOIhttps://doi.org/10.1103/PhysRevB.82.165205
URN:NBNurn:nbn:hr:217:097726
Publication2010
ProjectNumber: 035-0352826-2847
Title (croatian): Modeliranje fizikalnih svojstava materijala s izraženom frustracijom ili neredom
Leader: Eduard Tutiš
Jurisdiction: Croatia
Funding stream: ZP
Document URLhttp://link.aps.org/doi/10.1103/PhysRevB.82.165205
Type of resourceText
Access conditionsOpen access
Terms of useLicence In copyright icon
Public noteCopyright (2010) by the American Physical Society. Received 26 August 2010; published 29 October 2010.
Created on2019-11-03 16:48:29