Orbital current patterns in doped two-leg Cu-O Hubbard ladders
Strongly Correlated Electrons
2016-06-15 v1 Superconductivity
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.
Cite
@article{arxiv.0804.2779,
title = {Orbital current patterns in doped two-leg Cu-O Hubbard ladders},
author = {P. Chudzinski and M. Gabay and T. Giamarchi},
journal= {arXiv preprint arXiv:0804.2779},
year = {2016}
}