“…From equation (3), the electron effective masses along the [100] (
) and [001] (
) direction of the pure titanium dioxide and titanium dioxide doped with high‐valence transition metals are calculated, Table 3. The calculated results of niobium‐doped titanium dioxide are consistent with values reported in the literatures
[37, 43]. To simplifying the comparison, we defined
as the average effective mass of
and
by the following equation [45].
…”