Electronic Structure and Resonant Circular Dichroism of La$_{0.7}$Sr$_{0.3}$MnO$_3$ from Soft X-ray Angle-Resolved Photoemission

TL;DR

This study investigates the electronic structure and magnetic circular dichroism of La0.7Sr0.3MnO3 thin films using soft X-ray ARPES, revealing detailed band structure and magnetic properties relevant for future spintronic applications.

Contribution

It demonstrates the combined use of ARPES and X-ray magnetic circular dichroism to study momentum- and spin-resolved magnetic phenomena in transition-metal oxides.

Findings

Agreement between ARPES measurements and DFT calculations with Hubbard U

Observation of momentum-resolved magnetic circular dichroism at Mn L-edge

Potential for studying unconventional magnetism using combined techniques

Abstract

Coupling between spin, orbital, charge, and lattice degrees of freedom in transition-metal oxides produces a variety of electronic and magnetic phenomena of importance for future technologies. Here, we explore the electronic band structure of a (111)-oriented La0.7Sr0.3MnO3 thin film through soft X-ray angle-resolved photoemission spectroscopy (ARPES). The measurements agree with the electronic band structure calculated with density functional theory using Hubbard U correction. Furthermore, we probe the circular dichroism in ARPES, and observe a pronounced momentum- resolved magnetic circular dichroism in resonant photoemission from the Mn L-edge. The approach combines the momentum- and spin-selectivity of ARPES and X-ray magnetic circular dichroism, respectively, which could provide a useful approach for the study of unconventional magnetism.