Spin current in the Kondo lattice model

TL;DR

This paper investigates how strong Hund's rule coupling and s-d interactions in transition metals can generate spin currents through spin spirality, proposing a new spin battery design based on these interactions.

Contribution

It introduces the concept that spin spirality acts as a driving force for spin current generation due to effective coupling in the Kondo lattice model.

Findings

Spin spirality can drive spin current in transition metals.

A novel spin battery concept is proposed based on spin current and spirality interactions.

Strong Hund's rule coupling influences spin current generation.

Abstract

By using the projection operator technique it is observed that the strong Hund's rule coupling and s-d interaction in transition metal elements may lead to an effective coupling between the spin current and spin spirality. As a result, the spin spirality can be regarded as a driving force to produce a spin current. The spin current may give rise to a novel type of field acting on the spins. A spin battery is designed based on the interactions between the spin current and spin spirality.