The many surface reconstructions of (110)-oriented lanthanum strontium manganite (${\mathrm{La}}_{0.8}{\mathrm{Sr}}_{0.2}{\mathrm{MnO}}_3$, LSMO) were followed as a function of the oxygen chemical potential (${\mu }_{\text{O}}$) and the surface cation composition. Decreasing ${\mu }_{\text{O}}$ 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, and these results were used to build a two-dimensional phase diagram of the LSMO(110) equilibrium surface structures.

Close

PrevNext

View figure in article

• Composition
• Phase diagrams
• Surface reconstruction
• Surface-driven phase separation
• Complex oxides
• Single crystal materials
• Surfaces
• Scanning tunneling microscopy