Shallow Valence Band of Rutile GeO${}_2$ and P-type Doping

Christian A. Niedermeier, Keisuke Ide, Takayoshi Katase +2

GeO${}_2$ has an $\alpha$-quartz-type crystal structure with a very wide fundamental band gap of 6.6 eV and is a good insulator. Here we find that the stable rutile-GeO${}_2$ polymorph with…