Log-T divergence and Insulator-to-Metal Crossover in the normal state resistivity of fluorine doped SmFeAsO1-xFx

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dc.creatorRiggs, S. C.
dc.creatorKemper, J. B.
dc.creatorJo, Y.
dc.creatorStegen, Z.
dc.creatorBalicas, L.
dc.creatorBoebinger, G. S.
dc.creatorBalakirev, F. F.
dc.creatorMigliori, Albert
dc.creatorChen, H.
dc.creatorLiu, R. H.
dc.creatorChen, X. H.
dc.date2008-06-25
dc.date.accessioned2026-07-07T09:46:35Z
dc.date.available2026-07-07T09:46:35Z
dc.descriptionWe report the resistivity of a series of fluorine-doped SmFeAsO1-xFx polycrystalline superconductors in magnetic fields up to 60T. For underdoped samples (x < 0.15), the low temperature resistive state is characterized by pronounced magneto-resistance and a resistive upturn at low temperatures. The "insulating behavior" is characterized by a log-T divergence observed over a decade in temperature. In contrast, the normal state for samples with doping x > 0.15 display metallic behavior with little magnetoresistance, where intense magnetic fields broaden the superconducting transition rather than suppress Tc. The location of the insulator-to metal crossover coincides with the reported suppression of the structural phase transition (SPT)in the phase diagram for SmFeAsO1-xFx series.
dc.identifierhttps://arxiv.org/abs/0806.4011
dc.identifierhttp://arxiv.org/abs/0806.4011
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/163580
dc.subjectSuperconductivity
dc.titleLog-T divergence and Insulator-to-Metal Crossover in the normal state resistivity of fluorine doped SmFeAsO1-xFx
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