Spin wave instabilities and field induced transitions in heavy fermions

TL;DR

This paper investigates phase transitions in heavy fermion systems driven by spin-wave instabilities, focusing on changes near quantum critical points and magnetic field-induced transitions in antiferromagnetic materials.

Contribution

It introduces an approach based on spin-wave instabilities to analyze magnetic field-induced transitions in heavy fermion systems, complementing existing methods.

Findings

Changes in spin-wave parameters near QCPs analyzed

Spin-wave instability framework applied to field-induced transitions

Provides insights into magnetic phase behavior in heavy fermions

Abstract

We study phase transitions in heavy fermion systems due to spin-wave instabilities. One motivation is to determine the changes in the spin-wave parameters of a magnetically ordered heavy fermion system as it approaches a quantum critical point (QCP) by applying pressure. The other more actual is to provide an alternative approach, based on spin-wave instabilities, for the magnetic field induced transitions recently observed in antiferromagnetic heavy fermion materials.