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Su, D.
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Publications (7/7 displayed)
- 2021Highly oriented layers of the three‐dimensional semiconductor CdTe on the two‐dimensional layered semiconductors MoTe₂ and WSe₂
- 2017Metal-Free Oxidation of Glycerol over Nitrogen-Containing Carbon Nanotubescitations
- 2013Core-shell catalysts consisting of nanoporous cores for oxygen reduction reactioncitations
- 2011Metallic and Insulating Oxide Interfaces Controlled by Electronic Correlations
- 2011Metallic and Insulating Oxide Interfaces Controlled by Electronic Correlationscitations
- 2010In Situ Formation of Au-Pd Alloyed Nanoparticles during Liquid Phase Oxidation of Alcoholscitations
- 2006Pd and Pt catalysts modified by alloying with Au in the selective oxidation of alcoholscitations
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document
Metallic and Insulating Oxide Interfaces Controlled by Electronic Correlations
Abstract
The formation of two-dimensional electron gases (2DEGs) at complex oxide interfaces is directly influenced by the oxide electronic properties. We investigated how local electron correlations control the 2DEG by inserting a single atomic layer of a rare-earth oxide (RO) [(R is lanthanum (La), praseodymium (Pr), neodymium (Nd), samarium (Sm), or yttrium (Y)] into an epitaxial strontium titanate oxide (SrTiO3) matrix using pulsed-laser deposition with atomic layer control. We find that structures with La, Pr, and Nd ions result in conducting 2DEGs at the inserted layer, whereas the structures with Sm or Y ions are insulating. Our local spectroscopic and theoretical results indicate that the interfacial conductivity is dependent on electronic correlations that decay spatially into the SrTiO3 matrix. Such correlation effects can lead to new functionalities in designed heterostructures.