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Orbital current patterns in doped two-leg Cu-O Hubbard ladders

Gabay, M.
Published in Physical Review. B, Condensed Matter. 2008, vol. 78, no. 7
Abstract In the weak-coupling limit, we investigate two-leg ladders with a unit cell containing both Cu and O atoms as a function of doping. For purely repulsive interactions, using bosonization, we find significant differences with the single-orbital case: a completely massless quantum critical regime is obtained for a finite range of carrier concentration. In a broad region of the phase diagram, the ground state consists of a pattern of orbital currents plus a density wave. NMR properties of the Cu and O nuclei are presented for the various phases.
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CHUDZINSKI, Piotr, GABAY, M., GIAMARCHI, Thierry. Orbital current patterns in doped two-leg Cu-O Hubbard ladders. In: Physical Review. B, Condensed Matter, 2008, vol. 78, n° 7. https://archive-ouverte.unige.ch/unige:36040

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Deposited on : 2014-04-28

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