Renormalization-group analysis of the one-dimensional extended Hubbard model with a single impurity

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dc.creatorAndergassen, S.
dc.creatorEnss, T.
dc.creatorMeden, V.
dc.creatorMetzner, W.
dc.creatorSchollwoeck, U.
dc.creatorSchoenhammer, K.
dc.date2005-09-01
dc.date2006-02-01
dc.date.accessioned2026-07-07T06:41:41Z
dc.date.available2026-07-07T06:41:41Z
dc.descriptionWe analyze the one-dimensional extended Hubbard model with a single static impurity by using a computational technique based on the functional renormalization group. This extends previous work for spinless fermions to spin-1/2 fermions. The underlying approximations are devised for weak interactions and arbitrary impurity strengths, and have been checked by comparing with density-matrix renormalization-group data. We present results for the density of states, the density profile and the linear conductance. Two-particle backscattering leads to striking effects, which are not captured if the bulk system is approximated by its low-energy fixed point, the Luttinger model. In particular, the expected decrease of spectral weight near the impurity and of the conductance at low energy scales is often preceded by a pronounced increase, and the asymptotic power laws are modified by logarithmic corrections.
dc.description36 pages, 13 figures, revised version as published
dc.identifierhttps://arxiv.org/abs/cond-mat/0509021
dc.identifierhttp://arxiv.org/abs/cond-mat/0509021
dc.identifierPhys. Rev. B 73, 045125 (2006)
dc.identifierdoi:10.1103/PhysRevB.73.045125
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/101757
dc.subjectStrongly Correlated Electrons
dc.subjectMesoscale and Nanoscale Physics
dc.titleRenormalization-group analysis of the one-dimensional extended Hubbard model with a single impurity
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