It looks like the concept comes only from that paper. Your understanding in the last paragraph is correct. Whereas both types of transistors are current source

It looks like the concept comes only from that paper. Your understanding in the last paragraph is correct. Whereas both types of transistors are current sources, this hypothetical trancitor would act as a voltage source. From what I understand of the paper, it is only a theoretical and mathematical basis. One simulation with an ideal trancitor that they do shows that it saves some complexity by using less transistor/trancitors for a certain application and has better power efficiency. The issue is that it likely would break down at some points, and we would have to also figure out how to create this behavior in the first place. Here is a better article on it I found: https://www.technologyreview.com/2018/05/23/104350/another-missing-component-could-revolutionize-electronics/ https://www.technologyreview.com/2018/05/23/104350/another-m...