Enhancement of antiferromagnetic correlations below superconducting transition temperature in bilayer superconductors

TL;DR

This paper investigates how antiferromagnetic correlations are enhanced below the superconducting transition in bilayer cuprates, using mean field theory to support experimental observations of coexistence and proximity effects.

Contribution

It provides a theoretical model demonstrating the enhancement of antiferromagnetic correlations below Tc and explores coexistence with superconductivity in bilayer systems.

Findings

Antiferromagnetic correlations are enhanced below Tc.

Mean field theory supports the proximity effect.

Coexistence of antiferromagnetism and superconductivity is possible.

Abstract

Motivated by the recent experiment in multilayered cuprate superconductors reporting the enhancement of antiferromagnetic order below the superconducting transition temperature, we study the proximity effect of the antiferromagnetic correlation in a bilayer system and also examine the possibility of a coexistence of antiferromagnetic order and superconductivity. We present the result of mean field theory that is consistent with the experiment and supports the proximity effect picture.