Mixed Dimensionality of Confined Conducting Electrons in the Surface Region of SrTiO${}_3$

N. C. Plumb, M. Salluzzo, E. Razzoli +16

Using angle-resolved photoemission spectroscopy, we show that the recently-discovered surface state on SrTiO${}_3$ consists of non-degenerate $t_{2g}$ states with different dimensi…