Emergent inductance from spin fluctuations in strongly correlated magnets

TL;DR

This paper explores how spin fluctuations in strongly correlated magnets can lead to emergent inductance, revealing temperature and frequency-dependent behaviors that could impact future magnetic device technologies.

Contribution

It introduces the concept of emergent inductance in strongly correlated magnets and analyzes its temperature and frequency dependence in various electronic structures.

Findings

Inductive peak occurs above the magnetic ordering temperature.

Drude-type inductance observed in single-band or gapped multi-band systems.

Non-Drude inductance with a zero-frequency dip in gapless multi-band systems.

Abstract

Recently, the intriguing phenomenon of emergent inductance has been theoretically proposed and experimentally observed in nanoscale spiral spin systems subjected to oscillating currents. Building upon these recent developments, we put forward the concept of emergent inductance in strongly correlated magnets in the normal state with spin fluctuations. It is argued that the inductance shows a positive peak at temperatures above the ordering temperature. As for the frequency dependence, in systems featuring a single-band structure or a gapped multi-band, we observe a Drude-type, while in gapless multi-band systems, a non-Drude inductance with a sharp dip near zero frequency. These results offer valuable insights into the behavior of strongly correlated magnets and open up new possibilities for harnessing emergent inductance in practical applications.