On the Origin of the 2DEG Carrier Density at the LaAlO${}_3$/SrTiO${}_3$ Interface

Zoran S. Popović, Sashi Satpathy, Richard M. Martin

Transport measurements of the two-dimensional electron gas (2DEG) at the LaAlO${}_3$/SrTiO${}_3$ interface have found a density of carriers much lower than expected from the "polar cat…