Nonequilibrium Kondo-vs-RKKY Scenarios in Nanoclusters

TL;DR

This paper investigates how ultrafast currents can dynamically switch magnetic interactions in nanoclusters, revealing nonequilibrium Kondo and RKKY phase behaviors with potential technological implications.

Contribution

It introduces a method to control magnetic phases in nanoclusters via currents, exploring nonequilibrium Kondo and RKKY interactions in small geometries.

Findings

Currents induce dynamical switching between exchange interactions.

Study of nonequilibrium Doniach phase diagrams.

Time-dependent Kondo-RKKY scenarios analyzed.

Abstract

Ultrafast manipulations of magnetic phases are eliciting increasing attention from the scientific community, because potentially relevant to the understanding of nonequilibrium phase transitions and to novel technologies. Here, we focus on manipulations applied to magnetic impurities in metallic hosts. By considering small nanoring geometries, we show how currents can induce a dynamical switching between different types of exchange interactions in these systems. Our work thus opens a study window on nonequilibrium Doniach's magnetic phase diagrams, and time-dependent Kondo-vs-RKKY scenarios.