Fig. 1(b)
From: Base Transit Time in Abrupt GaN/InGaN/GaN and AlGaN/GaN/AlGaN HBTs

The effective electron velocity at base-collector junction, Sc , versus Vbc for InxGa1−xN/GaN.
From: Base Transit Time in Abrupt GaN/InGaN/GaN and AlGaN/GaN/AlGaN HBTs
The effective electron velocity at base-collector junction, Sc , versus Vbc for InxGa1−xN/GaN.