Resonant photoemission with circular polarized light on magnetized LSMO

TL;DR

This study demonstrates the use of resonant photoemission with circular polarized light to probe the electronic structure and spin properties of magnetized La0.7Sr0.3MnO3, revealing effects related to its half-metallic nature.

Contribution

It introduces a novel application of circular polarized resonant photoemission to analyze the electronic and magnetic properties of half-metals.

Findings

Detected dichroic signals at Mn L2,3 absorption edges.

Observed helicity-dependent shifts in resonant photoelectron energies.

Provided an estimate of the material's spin half-gap.

Abstract

We have used resonant photoemission with circular polarized light as a new tool to obtain information about the electronic structure of half-metals. After careful sample surface preparation of La0.7Sr0.3MnO3, we have obtained a dichroic signal for the L2,3 absorption of Mn. Working with a magnetized sample and circular polarized light we observe a clear effect of the helicity of light on the position of the resonant Raman-Auger photoelectrons from the Mn 2p3p3d decay. These results allow us to achieve a rough estimate of the half-metallic spin half-gap.