Extraordinary SEAWs under influence of the spin-spin interaction and the quantum Bohm potential

TL;DR

This paper investigates how spin-spin interactions and the quantum Bohm potential influence the spectrum of extraordinary spin-electron acoustic waves (SEAWs), revealing new effects and hybridization phenomena in magnetized quantum plasmas.

Contribution

It introduces the effects of spin-spin interaction and quantum Bohm potential on extraordinary SEAWs, including their role in wave existence and hybridization in specific regimes.

Findings

Spin-spin interaction enables the existence of extraordinary SEAWs without SSE.

Quantum Bohm potential significantly alters the wave spectrum.

Hybridization occurs between extraordinary SEAW and lower extraordinary wave when cyclotron frequency exceeds Langmuir frequency.

Abstract

The separate spin evolution (SSE) of electrons causes the existence of the spin-electron acoustic wave. Extraordinary spin-electron acoustic waves (SEAWs) propagating perpendicular to the external magnetic field have large contribution of the transverse electric field. Its spectrum has been studied in the quasi-classical limit at the consideration of the separate spin evolution. The spin-spin interaction and the quantum Bohm potential give contribution in the spectrum extraordinary SEAW. This contribution is studied in this paper. Moreover, it is demonstrated that the spin-spin interaction leads to the existence of the extraordinary SEAWs if the SSE is neglected. The hybridization of the extraordinary SEAW and the lower extraordinary wave in the regime, where the cyclotron frequency is larger then the Langmuir frequency is studied either.