| Orbital current patterns in doped two-leg Cu-O Hubbard ladders (2008) | |||||||||
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. | |||||||||
Publication details | |||||||||
| |||||||||