The many surface reconstructions of (110)-oriented lanthanum--strontium manganite (La0.8Sr0.2MnO3, LSMO) were followed as a function of the oxygen chemical potential (μO) and the surface cation composition. Decreasing μO causes Mn to migrate across the surface, enforcing phase separation into A-site-rich areas and a variety of composition-related, structurally diverse B-site-rich reconstructions. The composition of these phase-separated structures was quantified with scanning tunneling microscopy (STM), and these results were used to build a 2D phase diagram of the LSMO(110) equilibrium surface structures.
@article{arxiv.2010.05205,
title = {2D Surface Phase Diagram of a Multicomponent Perovskite Oxide: La$_{0.8}$Sr$_{0.2}$MnO$_3$(110)},
author = {Giada Franceschi and Michael Schmid and Ulrike Diebold and Michele Riva},
journal= {arXiv preprint arXiv:2010.05205},
year = {2021}
}