Multilayer cuprate superconductors as possible systems described by resonating-valence-bond and antiferromagnetic orders

TL;DR

This paper models multilayer cuprate superconductors using the t-J model, showing that antiferromagnetic and superconducting orders coexist due to weak three-dimensional effects, aligning well with experimental phase diagrams.

Contribution

It demonstrates that the slave-boson mean-field approach of the two-dimensional t-J model can accurately reproduce the coexistence of antiferromagnetism and superconductivity in multilayer cuprates.

Findings

Experimental phase diagram is well reproduced by the model.

Weak three-dimensionality stabilizes antiferromagnetic order.

Coexistence of antiferromagnetism and superconductivity is explained.

Abstract

Coexistence of antiferromagnetism and d-wave superconductivity within a CuO_2 plane was recently observed in a wide doping region for multilayer high-temperature cuprate superconductors. We find that the experimental phase diagram is well reproduced in the slave-boson mean-field scheme of the two-dimensional t-J model by including antiferromagnetic order. We argue that weak three dimensionality coming from a multilayer structure is sufficient to stabilize antiferromagnetic order and its coexistence with superconductivity.