Phase diagram of hole doped two-leg Cu-O ladders

Abstract

In the weak coupling limit, we establish the phase diagram of a two-leg ladder with a unit cell containing both Cu and O atoms, as a function of doping. We use bosonization and design a specific RG procedure to handle the additional degrees of freedom. Significant differences are found with the single orbital case; for purely repulsive interactions, a completely massless quantum critical region is obtained at intermediate carrier concentrations (well inside the bands) where the ground state consists of an incommensurate pattern of orbital currents plus a spin density wave (SDW) structure.

4 pages, 2 figures, accepted to Phys. Rev. B, Rapid Comm

References in corpus (3)

• Magnetic order in the pseudogap phase of high-$T_C$ superconductors
• A Theory of the Pseudogap State of the Cuprates
• Phase diagram of the three band half-filled Cu-O two-leg ladder

Cited by in corpus (14)

• Orbital currents in extended Hubbard models of high-T${}_c$ cuprates
• Mean-Field Analysis of Intra-Unit-Cell Order in the Emery Model of the CuO${}_2$ Plane
• Numerical analysis of three-band models for CuO planes as candidates for a spontaneous T violating orbital current phase
• Orbital current patterns in doped two-leg Cu-O Hubbard ladders
• A Field Theory for Fermionic Ladder with Generic Intrachain Interactions
• Doping evolution of charge and spin excitations in two-leg Hubbard ladders: comparing DMRG and RPA+FLEX results
• Finite wave vector pairing in doped two-leg ladders
• Time-reversal symmetry breaking phase in the Hubbard model: a VCA study
• Response functions in multicomponent Luttinger liquids
• Spin rotational symmetry breaking by orbital current patterns in two-leg ladders.
• Influence of non-magnetic impurities on hole doped two-leg Cu-O Hubbard ladders
• Competing phases and critical behavior in three coupled spinless Luttinger liquids
• Electronic Liquid Crystal Physics of Underdoped Cuprates
• Spontaneous Currents in Spinless Fermion Lattice Models at the Strong-Coupling Limit