The electronic properties of complex oxide heterostructures are governed by the physics at the interface between the different materials. Here, the authors use infrared ellipsometry and confocal Raman spectroscopy to show the presence of non-collinear and asymmetric interfacial polar moments in SrTiO3-based heterostructures underlying the important role of oxygen vacancies in these systems.
- Fryderyk Lyzwa
- Yurii G. Pashkevich
- Christian Bernhard
