Surface spin-electron acoustic waves in magnetically ordered metals

TL;DR

This paper predicts and analyzes the existence of surface spin-electron acoustic waves in magnetically ordered metals using quantum hydrodynamics, revealing their hybridization with Langmuir waves and proposing a method for their generation.

Contribution

The study introduces the concept of surface spin-electron acoustic waves in magnetically ordered metals and explores their hybridization with Langmuir waves, providing a new approach for their generation.

Findings

Existence of surface spin-electron acoustic waves demonstrated.

Hybridization between SSEAW and Langmuir waves identified.

Method proposed for generating SSEAWs via Langmuir wave excitation.

Abstract

Degenerate plasmas with motionless ions show existence of three surface waves: the Langmuir wave, the electromagnetic wave, and the zeroth sound. Applying the separated spin evolution quantum hydrodynamics to half-space plasma we demonstrate the existence of the surface spin-electron acoustic wave (SSEAW). We study dispersion of the SSEAW. We show that there is hybridization between the surface Langmuir wave and the SSEAW at rather small spin polarization. In the hybridization area the dispersion branches are located close to each other. In this area there is a strong interaction between these waves leading to the energy exchange. Consequently, generating the Langmuir waves with the frequencies close to hybridization area we can generate the SSEAWs. Thus, we report a method of creation of the SEAWs.