Proposal for a Topological Plasmon Spin Rectifier

TL;DR

This paper proposes a device leveraging topological insulator surface states to generate static spin accumulation via plasmon modes, potentially serving as a spin battery for spintronics.

Contribution

It introduces a novel topological plasmon spin rectifier device that converts AC plasmon modes into static spin accumulation, combining simulation with potential applications.

Findings

Finite-difference time-domain simulations demonstrate spin-pumping mechanism.

The device can generate a measurable static spin accumulation.

Potential use as a DC spin battery in spintronic applications.

Abstract

We propose a device in which the spin-polarized AC plasmon mode in the surface state of a topological insulator nanostructure induces a static spin accumulation in a resonant, normal metal structure coupled to it. Using a finite-difference time-domain model, we simulate this spin-pump mechanism with drift, diffusion, relaxation, and precession in a magnetic field. This optically-driven system can serve as a DC "spin battery" for spintronic devices.