Phase diagram of the three band half-filled Cu-O two-leg ladder

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dc.creatorLee, S.
dc.creatorMarston, J. B.
dc.creatorFjaerestad, J. O.
dc.date2005-03-15
dc.date2005-07-25
dc.date.accessioned2026-07-07T06:21:54Z
dc.date.available2026-07-07T06:21:54Z
dc.descriptionWe determine the phase diagram of the half-filled two-leg ladder both at weak and strong coupling, taking into account the Cu d_{x^2-y^2} and the O p_x and p_y orbitals. At weak coupling, renormalization group flows are interpreted with the use of bosonization. Two different models with and without outer oxygen orbitals are examined. For physical parameters, and in the absence of the outer oxygen orbitals, the D-Mott phase arises; a dimerized phase appears when the outer oxygen atoms are included. We show that the circulating current phase that preserves translational symmetry does not appear at weak coupling. In the opposite strong-coupling atomic limit the model is purely electrostatic and the ground states may be found by simple energy minimization. The phase diagram so obtained is compared to the weak-coupling one.
dc.description10 pages, 5 figures, Version accepted for publication in PRB
dc.identifierhttps://arxiv.org/abs/cond-mat/0503380
dc.identifierhttp://arxiv.org/abs/cond-mat/0503380
dc.identifierPhys. Rev. B 72, 075126 (2005)
dc.identifierdoi:10.1103/PhysRevB.72.075126
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/95749
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titlePhase diagram of the three band half-filled Cu-O two-leg ladder
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