Coherence-Incoherence and Dimensional Crossover in Layered Strongly Correlated Metals

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dc.creatorValla, T.
dc.creatorJohnson, P. D.
dc.creatorYusof, Z.
dc.creatorWells, B.
dc.creatorLi, Q.
dc.creatorLoureiro, S. M.
dc.creatorCava, R. J.
dc.creatorMikami, M.
dc.creatorMori, Y.
dc.creatorYoshimura, M.
dc.creatorSasaki, T.
dc.date2002-03-29
dc.date2002-04-11
dc.date.accessioned2026-07-07T07:37:22Z
dc.date.available2026-07-07T07:37:22Z
dc.descriptionCorrelations between electrons and the effective dimensionality are crucial factors that shape the properties of an interacting electron system. For example, the onsite Coulomb repulsion, U, may inhibit, or completely block the intersite electron hopping, t, and depending on the ratio U/t, a material may be a metal or an insulator. The correlation effects increase as the number of allowed dimensions decreases. In 3D systems, the low energy electronic states behave as quasiparticles (QP), while in 1D systems, even weak interactions break the quasiparticles into collective excitations. Dimensionality is particularly important for a class of new exotic low-dimensional materials where 1D or 2D building blocks are loosely connected into a 3D whole. Small interactions between the blocks may induce a whole variety of unusual transitions. Here, we examine layered systems that in the direction perpendicular to the layers display a crossover from insulating-like, at high temperatures, to metallic-like character at low temperatures, while being metallic over the whole temperature range within the layers. We show that this change in effective dimensionality correlates with the existence or non-existence of coherent quasiparticles within the layers.
dc.identifierhttps://arxiv.org/abs/cond-mat/0204003
dc.identifierhttp://arxiv.org/abs/cond-mat/0204003
dc.identifierNature 417, 627 (2002)
dc.identifierdoi:10.1038/nature00774
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/120757
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titleCoherence-Incoherence and Dimensional Crossover in Layered Strongly Correlated Metals
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