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Origin of the high, mobile charge density at the interfaces investigated in this project.

Two-Dimensional Electron Liquids in Oxides Susanne Stemmer, University of California-Santa Barbara, DMR 1006640.

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Origin of the high, mobile charge density at the interfaces investigated in this project.

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  1. Two-Dimensional Electron Liquids in OxidesSusanne Stemmer, University of California-Santa Barbara, DMR 1006640 • Researchers at the University of California, Santa Barbara have created electrically conducting, two-dimensional electron liquids at interfaces between two insulating oxides. These electron liquids exhibit unique properties, such as extremely high charge carrier densities, and magnetism. • The interfaces investigated in this project are comprised of two different complex oxides, gadolinium titanate and strontium titanate. Both materials are insulators in their bulk forms. Interfaces between these two materials are created by growing thin films, using molecular beam epitaxy. Because of a discontinuity in the electric charge associated with the atomic planes in these two materials, a two-dimensional sheet containing a high-density of mobile electrons can be observed at the interface. Origin of the high, mobile charge density at the interfaces investigated in this project. Magnetism of the electron gas at the interface.

  2. Research Experience for UndergraduatesSusanne Stemmer, University of California-Santa Barbara, DMR 1006640 • The project provides numerous opportunities for the involvement and training of undergraduate students in research in oxide thin films. • Two undergraduate students have participated or are currently participating in the research, including an international exchange student from Fudan University in China and a Mechanical Engineering Junior at UCSB. The pictures show the students involved in Seebeckmeasurements of two-dimensional electron gases in SrTiO3.

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