Spin dynamics in high-$T_C$ superconductors

TL;DR

This paper discusses the antiferromagnetic spin dynamics in high-temperature cuprate superconductors, focusing on resonance peaks and incommensurate structures related to superconductivity.

Contribution

It provides insights into the magnetic excitation features and their evolution across the superconducting transition in cuprates.

Findings

Resonance peak appears only in the superconducting state.

A broader magnetic contribution persists above $T_C$.

Interplay of features may lead to incommensurate structures.

Abstract

Key features of antiferromagnetic dynamical correlations in high-$T_C$ superconductors cuprates are discussed. In underdoped regime, the sharp resonance peak, occuring exclusively in the SC state, is accompanied by a broader contribution located around $\sim$ 30 meV which remains above $T_C$. Their interplay may induce incommensurate structure in the superconducting state.