Abstract
Holes can be readily doped into small-gap semiconductors such as Si or GaAs, but corresponding -type doping in wide-gap insulators, while maintaining transparency, has proven difficult. Here, by utilizing design principles distilled from theory with systematic measurements in the prototype O spinel CoZnO, we formulate and test practical design rules for effective hole doping. Using these, we demonstrate a 20-fold increase in the hole density in CoZnO due to extrinsic (Mg) doping and, ultimately, a factor of 10 increase for the inverse spinel CoNiO, the 1 end point of Ni-doped CoZnNiO.
- Received 30 September 2011
DOI:https://doi.org/10.1103/PhysRevB.84.205207
©2011 American Physical Society