Anomalous Magnetic Susceptibility in Iron Pnictides: Paramagnetic Phase

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dc.creatorLaad, M. S.
dc.creatorCraco, L.
dc.date2009-03-22
dc.date.accessioned2026-07-07T12:55:35Z
dc.date.available2026-07-07T12:55:35Z
dc.descriptionObservation of an anomalous temperature dependence of the spin susceptibility, along with a spin gap in NMR, in the quantum paramagnetic normal state of Iron Pnictides is a signature of an unusual metallic state. We argue that both these anomalous features are associated with a wide fluctuational regime dominated by dynamical, short-ranged and frustrated spin correlations in a strongly correlated metal. Using LDA+DMFT, we show that both these features can be quantitatively undertstood in the doped Fe-pnictides. We argue that such spin correlations naturally arise in a Mottness scenario, where an effective, dualistic description involves coexisting renormalized quasiparticles and effectively localized moments, arising from the same set of d bands.
dc.description4 pages, 2 eps figures, submitted to PRB
dc.identifierhttps://arxiv.org/abs/0903.3732
dc.identifierhttp://arxiv.org/abs/0903.3732
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/224298
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titleAnomalous Magnetic Susceptibility in Iron Pnictides: Paramagnetic Phase
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