Nematic and spin-charge orders driven by hole-doping a charge-transfer insulator
Abstract
Recent experimental discoveries have brought a diverse set of broken symmetry states to the center stage of research on cuprate superconductors. Here, we focus on a thematic understanding of the diverse phenomenology by exploring a strong-coupling mechanism of symmetry breaking driven by frustration of antiferromagnetic order. We achieve this through a variational study of a three-band model of the CuO plane with Kondo-type exchange couplings between doped oxygen holes and classical copper spins. Two main findings from this strong-coupling multi-band perspective are 1) that the symmetry hierarchy of spin stripe, charge stripe, intra-unit-cell nematic order and isotropic phases are all accessible microscopically within the model, 2) many symmetry-breaking patterns compete with energy differences within a few meV per Cu atom to produce a rich phase diagram. These results indicate that the diverse phenomenology of broken-symmetry states in hole-doped antiferromagnetic charge-transfer insulators may indeed arise from hole-doped frustration of antiferromagnetism.
Cite
@article{arxiv.1406.2711,
title = {Nematic and spin-charge orders driven by hole-doping a charge-transfer insulator},
author = {Mark H. Fischer and Si Wu and Michael Lawler and Arun Paramekanti and Eun-Ah Kim},
journal= {arXiv preprint arXiv:1406.2711},
year = {2014}
}