Dresden 2014 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 94: Low-Dimensional Systems: Oxide Hetero-Interfaces

TT 94.5: Talk

Thursday, April 3, 2014, 16:00–16:15, HSZ 204

Interaction induced instabilities in LaAlO₃/SrTiO₃ interfaces — •Mathias Scheurer and Jörg Schmalian — Institut für Theorie der Kondensierten Materie, Karlsruher Institut für Technologie, Karlsruhe, Deutschland

At the interface between insulating oxides, novel phases with peculiar electronic properties arise. In this talk, we focus on one specific example, the heterostructure formed by the perovskite oxides LaAlO₃ and SrTiO₃. Using the renormalization group approach, the effect of electron-electron interactions is studied. We consider all interaction terms consistent with the symmetries of the system and analyze the stability of the electron fluid towards the formation of symmetry broken phases.