Infrared ellipsometry study of the confined electrons in a high-mobility $\gamma$-Al${}_2$O${}_3$/SrTiO${}_3$ heterostructure

Meghdad Yazdi-Rizi, Premysl Marsik, Benjamin Mallett +5

With infrared ellipsometry we studied the response of the confined electrons in a $\gamma$-Al${}_2$O${}_3$/SrTiO${}_3$ heterostructures in which they originate predominantly from oxygen vacan…