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

Authors
Gabay, M.
Published in Physical Review. B, Condensed Matter. 2007, vol. 76, no. 16
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 renormalization group 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 structure.
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CHUDZINSKI, Piotr, GABAY, M., GIAMARCHI, Thierry. Phase diagram of hole doped two-leg Cu-O ladders. In: Physical Review. B, Condensed Matter, 2007, vol. 76, n° 16. https://archive-ouverte.unige.ch/unige:36062

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Deposited on : 2014-04-28

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