Aspects of the normal state phase of copper oxide planes in high Tc superconductors

TL;DR

This paper investigates the complex normal state phases of CuO₂ planes in high-temperature superconductors, focusing on the interplay of charge density waves, antiferromagnetism, and paramagnetism using advanced modeling techniques.

Contribution

It introduces a detailed analysis of competing phases in the CuO₂ planes using the three band Hubbard model and the finite U slave boson method, highlighting the effects of doping.

Findings

Charge density wave phase induced by oxygen breathing modes

Competition between antiferromagnetic order and paramagnetism

Doping-dependent phase behavior in CuO₂ planes

Abstract

We examine various aspects of the normal state phase of ${\rm CuO_{2}}$ planes in the high Tc superconductors. In particular, within the context of the three band Hubbard model, we study as a function of doping the competition between a charge density wave phase induced by oxygen breathing modes, antiferromagnetic order and paramagnetism. To account for the strong electronic interactions, we use the finite $U$ slave boson method of Kotliar and Ruckenstein.