Edge-state transport in circular quantum point contact quantum piezotronic transistors

Quantum piezotronic transistor is studied based on HgTe/CdTe topological insulator with a circular quantum point contact. The radius of the region modulated by strain-induced piezoelectric potential. electronic transport behavior edge and bulk states explored calculating conductance density distribution under different Fermi energies strains. Transport property machine learning method can be effectively predicted. These results show that neural network used for obtaining properties, it has great potential optimizing designing high-performance devices.