Polaron relaxation and hopping conductivity in LaMn$_{1-x}$Fe$_{x}$O$_3$

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dc.creatorKarmakar, A.
dc.creatorMajumdar, S.
dc.creatorGiri, S.
dc.date2008-10-20
dc.date.accessioned2026-07-07T13:04:42Z
dc.date.available2026-07-07T13:04:42Z
dc.descriptionDc and ac transport properties as well as electric modulus spectra have been investigated for the samples LaMn$_{1-x}$Fe$_{x}$O$_3$ with compositions 0 $\leq x \leq$ 1.0. The bulk dc resistivity shows a temperature variation consistent with the variable range hopping mechanism at low temperature and Arrhenius mechanism at high temperatures. The ac conductivity has been found to follow a power law behavior at a limited temperature and frequency region where Anderson-localization plays a significant role in the transport mechanism for all the compositions. At low temperatures large dc resistivities and dielectric relaxation behavior for all the compositions are consistent with the polaronic nature of the charge carriers. Scaling of the modulus spectra shows that the charge transport dynamics is independent of temperature for a particular composition but depends strongly on different compositions possibly due to different charge carrier concentrations and structural properties.
dc.description9 figures
dc.identifierhttps://arxiv.org/abs/0810.3502
dc.identifierhttp://arxiv.org/abs/0810.3502
dc.identifierPHYSICAL REVIEW B 79, 094406 (2009)
dc.identifierdoi:10.1103/PhysRevB.79.094406
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/227254
dc.subjectStrongly Correlated Electrons
dc.titlePolaron relaxation and hopping conductivity in LaMn$_{1-x}$Fe$_{x}$O$_3$
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