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 ef...

We consider electron transport through a quantum point contact between compressible Quantum Hall liquids and derive the contact’s impedance function for both diffusive and ballistic regimes of the bulk electron motion. In either regime, the tunneling current deviates from a power-law behavior I ∼ V 1/ν expected on the basis of the single-mode chiral Luttinger liquid phenomenology.

We elaborate on a theory of electronic transport through a quantum point contact (QPC) in the Quantum Hall (QH) regime, which does not discriminate between compressible and incompressible QH liquids, and accounts for both diffusive and ballistic regimes of the bulk electron motion. In either regime we find departures from the accustomed chiral Luttinger liquid behavior. The results suggest that...

Analysis of the temperature-dependent quantum point contact conductance in view of the metal-insulator transition in two dimensions Abstract The temperature dependence of the conductance of a quantum point contact has been measured. The conductance as a function of the Fermi energy shows temperature-independent fixed points, located at roughly multiple integers of e 2 /h. Around the first fixed...