Common energy scale for magnetism and superconductivity in cuprates

TL;DR

This paper reveals that a common energy scale governs both superconductivity and magnetism in cuprates, highlighting their close relationship in these materials.

Contribution

It identifies a universal energy scale that determines both the critical temperature for superconductivity and the magnetic transition in cuprates.

Findings

Tc and Tg are governed by the same energy scale

Superconductivity and magnetism are closely linked in cuprates

The energy scale is consistent across different cuprate families

Abstract

Many compounds based on CuO_2 planes (cuprates) super-conduct below a critical temperature Tc. Some of them show a second phase where a spontaneous static magnetic field appears below a critical temperature Tg, which is lower then Tc. By comparing Tc and Tg in numerous superconducting families, each with its own maximum Tc, we find that the same energy scale determines both critical temperatures. This clearly indicates that superconductivity and magnetism are intimately related in the cuprates.