Origin and transport properties of the 2-dimensional electron gas at the LaAlO3/SrTiO3 interface
July, 12nd 2012 - 11:00 am
Seminar by Dr. Stefano Gariglio (part 1) and Dr. Daniela Stornaiuolo (part 2)
DPMC, University of Geneve
Title: Origin and transport properties of the 2-dimensional electron gas at the LaAlO3/SrTiO3 interface
Location: Room 15, - 4th floor, buiding 9, Dipartimento di Fisica - Università di Salerno
Interfaces between complex oxides are emerging as one of the most exciting systems in condensed-matter physics . The interface between the band insulators LaAlO3 (LAO) and SrTiO3(STO) provides a remarkable illustration , displaying a two-dimensional electron gas (2DEG) and superconductivity .
We will first discuss recent experiments aimed at determining the physical mechanism that induces the electron gas at the LAO/STO interface. Then we will present magnetoresistance oscillations in devices exhibiting high electron mobility provided by recent progress in sample growth. We will conclude reporting on the fabrication and mesoscopic effects in superconducting nanostructures.
 P. Zubko, S. Gariglio, M. Gabay, P. Ghosez, J.-M. Triscone, Annu. Rev. Condens. Matter Phys. 2, 141 (2011).
 A. Ohtomo, H. Y. Hwang, Nature 427, 423 (2004).
 A.D. Caviglia et al., Phys. Rev. Lett. 105, 236802 (2010).
 N. Reyren et al., Science 317, 1197 (2007).