Observation by resonant angle-resolved photoemission of a critical thickness for 2-dimensional electron gas formation in SrTiO${}_3$ embedded in GdTiO${}_3$

S. Nemšák, G. Conti, G. K. Pálsson +15

For certain conditions of layer thickness, the interface between GdTiO${}_3$ (GTO) and SrTiO${}_3$ (STO) in multilayer samples has been found to form a two-dimensional electron gas (2D…