Luttinger liquid superlattices: realization of gapless insulating phases

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dc.creatorSilva-Valencia, J.
dc.creatorMiranda, E.
dc.creatorSantos, Raimundo R. dos
dc.date2002-01-02
dc.date2002-04-24
dc.date.accessioned2026-07-07T02:44:00Z
dc.date.available2026-07-07T02:44:00Z
dc.descriptionWe investigate Luttinger Liquid superlattices, a periodic structure composed of two kinds of one-dimensional systems of interacting electrons. We calculate several properties of the low-energy sector: the effective charge and spin velocities, the compressibility, various correlation functions, the Landauer conductance and the Drude weight. The low-energy properties are subsumed into effective parameters, much like homogeneous one-dimensional systems. A generic result is the weighted average nature of these parameters, in proportion to the spatial extent of the underlying subunits, pointing to the possibility of ``engineered'' structures. As a specific realization, we consider a one-dimensional Hubbard superlattice, which consists of a periodic arrangement of two long Hubbard chains with different coupling constants and different hopping amplitudes. This system exhibits a rich phase diagram with several phases, both metallic and insulating. We have found that gapless insulating phases are present over a wide range of parameters.
dc.description16 pages, 15 figures, RevTeX4
dc.identifierhttps://arxiv.org/abs/cond-mat/0201017
dc.identifierhttp://arxiv.org/abs/cond-mat/0201017
dc.identifierPhys. Rev. B 65, 115115 (2002)
dc.identifierdoi:10.1103/PhysRevB.65.115115
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/18738
dc.subjectStrongly Correlated Electrons
dc.titleLuttinger liquid superlattices: realization of gapless insulating phases
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