Theoretical study on the slit experiments in the Rashba electron systems

TL;DR

This paper presents a theoretical framework for slit experiments in Rashba electron systems, demonstrating how spin orientations and interference patterns can be controlled electrically for spintronic applications.

Contribution

It introduces a novel theoretical model for electron interference in Rashba systems, showing how spin precession and interference can be manipulated via gate voltages.

Findings

Interference fringes exhibit specific spin orientations due to Rashba spin precession.

Spin orientations can be controlled by tuning the Rashba parameter with electric gates.

Potential for electrically tunable spin transmission and spin-polarized current generation.

Abstract

We develop a theory of designing slit experiments in two-dimensional electron systems with the Rashba spin-orbit interaction. By simulating the spatiotemporal dynamics of electrons passing through a single slit or a double slit, we find that the interference fringes of the electron probability density attain specific spin orientations via the precession of spins around effective magnetic fields mediated by the Rashba spin-orbit interaction whose directions are determined by the propagation path. The spin orientations of the fringes can be controlled by tuning the Rashba spin-orbit parameter, which can be achieved by applying an electric gate voltage. This phenomenon can be exploited to implement electrically tunable transmission of spin information and to generate spin-polarized currents.