Research:

1. Sr Ti O Electronic structure of SrTiO3: from fundamental physics to applications in oxide electronicsA. F. Santander-Syro* (LPEM-ESPCI and Université Paris-Sud, France),Work done at the Synchrotron Radiation Center (University of Wisconsin-Madison), which is supported by Award No. DMR 0537588 Research: Transition-metal oxides are multi-functional materials with potential novel applications in micro-electronics and information processing and storage. Among them, SrTiO3 (a band insulator in its bulk form) is a key material: it can be turned into a high mobility metal upon minute n-type doping, or into a ferroelectric with a few percent of biaxial strain. It is also a template to create novel two-dimensional phases at oxide interfaces, with potentially very different properties from those of the building blocks. We performed angular-resolved photoemission experiments on n-doped SrTiO3 to study its electronic structure. Our results should help in understanding the microscopic origin of its properties, and thus provide insight for the design of novel oxide-based devices for electronics. * Work done in collaboration with: T. Kondo (Ames-Lab), S. Pailhès (LLB-CEA), O. Copie, G. Herranz, M. Bibes and A. Barthélemy (Thales – CNRS and U. Paris-Sud.) Crystal structure of SrTiO3 Band of conduction electrons in n-doped SrTiO3. The band-width gives an estimate of the doping. The kinks shown by the arrows indicate possible interactions with phonons

2. Electronic structure of SrTiO3: from fundamental physics to applications in oxide electronicsA. F. Santander-Syro* (LPEM-ESPCI and Université Paris-Sud, France),Work done at the Synchrotron Radiation Center (University of Wisconsin-Madison), which is supported by Award No. DMR-0537588 Broader Impacts Societal and technological outputs SrTiO3 is a system that is crucial for numerous applications in hetero-structures and interfaces, with potential in the design of novel multi-functional oxide-based devices for micro-electronics. Our results have a direct impact in the understanding of the microscopic properties of SrTiO3. This is important for helping in optimizing its performances and advancing in the rationale for the design of devices based on this material. * Work done in collaboration with T. Kondo (Ames-Lab), S. Pailhès (LLB-CEA), O. Copie, G. Herranz, M. Bibes and A. Barthélemy (Thales – CNRS and U. Paris-Sud). Education, international aspects, participation of underrepresented groups One post-doc (T. Kondo, from Ames-Lab) and one graduate student (O. Copie, from Thales-CNRS and Université Paris-Sud, France) have participated in this work. In particular, the awarded beamtime was an excellent opportunity for training in photoemission spectroscopy and synchrotron techniques for the student. This work has the land-mark of a large international representation: all the persons who have participated in the beamtime are from abroad: T. Kondo is from Japan (and is the only one working in the US at present), O. Copie and S. Pailhès are French, and the P.I. (AFSS) is from Colombia (working in France).