2007/11/06 by Udo Schwingenschlögl, U. Schwingenschloegl, C. Schuster · 5 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Electronic and Structural Properties of Oxides #Magnetic and transport properties of perovskites and related materials #cond-mat.mtrl-sci
paper · pdf · doi:10.1209/0295-5075/81/17007
published as Europhysics Letters 81, 17007 (2008) · 10 pages, 3 figures, accepted by Europhys. Lett
arxiv created 2007/11/06 · openalex publication_date 2007/11/22 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
We report on surface effects on the electronic properties of interfaces in epitaxial LaAlO 3 /SrTiO 3 heterostructures. Our results are based on first-principles electronic structure calculations for well-relaxed multilayer configurations, terminated by an ultrathin LaAlO 3 surface layer. On varying the thickness of this layer, we find that the interface conduction states are subject to almost rigid band shifts due to a modified Fermi energy. Confirming experimental data, the electronic properties of heterointerfaces therefore can be tuned systematically by alterating the surface-interface distance. We expect that this mechanism is very general and applies to most oxide heterostructures.