  Amorphous oxides are important for implants, optics, and gate insulators.
Understanding the effects of oxide doping is crucial to optimize performance.
Here we report energy barrier distributions for amorphous tantala and doped
oxides using a new set of computationally efficient, two-body potentials that
reproduce the structural properties of the samples. The distributions can be
directly compared to experiment and used to calculate physical quantities such
as internal friction.
