Subband structure of a two-dimensional electron gas formed at the polar surface of the strong spin-orbit perovskite KTaO${}_3$

P. D. C. King, R. H. He, T. Eknapakul +13

We demonstrate the formation of a two-dimensional electron gas (2DEG) at the $(100)$ surface of the $5d$ transition-metal oxide KTaO${}_3$. From angle-resolved photoemission, we find…