New Spin-Wave Mode in Weak Ferromagnetic Fermi Liquids

TL;DR

This paper introduces a new spin-wave mode in weak ferromagnetic Fermi liquids, derived from a phenomenological model using Landau kinetic equations, highlighting the influence of interaction parameters on mode behavior.

Contribution

It identifies and characterizes a novel Silin-like ferromagnetic spin-wave mode in weak ferromagnetic Fermi liquids, expanding understanding of collective excitations.

Findings

Discovery of a new Silin-like ferromagnetic mode

Interaction parameter F^a_1 affects mode behavior

Analysis of Goldstone and new spin-wave modes

Abstract

We study a phenomenological model for weak ferromagnetic Fermi liquids and investigate the properties of the spin waves in the model. The Landau kinetic equation is used to derive, in addition to the known Goldstone mode, a new spin-wave mode -- the first Silin-like ferromagnetic mode. We discuss the role of the interaction parameter F^a_1 on the behavior of the Goldstone mode and the first Silin-like ferromagnetic mode.