Current-current correlations in the three-band model for two-leg CuO ladders

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dc.creatorNishimoto, S.
dc.creatorJeckelmann, E.
dc.creatorScalapino, D. J.
dc.date2008-04-18
dc.date.accessioned2026-07-07T09:33:31Z
dc.date.available2026-07-07T09:33:31Z
dc.descriptionWe study current-current correlations in the three-band Hubbard model for two-leg CuO ladders using the density-matrix renormalization group method. We find that these correlations decrease exponentially with distance for low doping but as a power law for higher doping. Their pattern is compatible with the circulating current (CC) phase which Varma has proposed to explain the pseudo-gaped metallic phase in underdoped high-temperature superconductors. However, for model parameters leading to a realistic ground state in the undoped ladder, the current fluctuations decay faster than the d-wave-like pairing correlations in the doped state. Thus we conclude that no phase with CC order or dominant CC fluctuations occur in the three-band model of two-leg CuO ladders.
dc.description4 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/0804.3085
dc.identifierhttp://arxiv.org/abs/0804.3085
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/159159
dc.subjectStrongly Correlated Electrons
dc.titleCurrent-current correlations in the three-band model for two-leg CuO ladders
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