We study the conductance threshold of clean nearly straight quantum wires in which an electron is bound. We show that such a system exhibits spin-dependent conductance structures on the rising edge to the first conductance plateau, one near 0.25(2e 2 /h), related to a singlet resonance, and one near 0.75(2e 2 /h), related to a triplet resonance. As a quantitative example we solve exactly the sc...

we study the coherent spin-polarized transport through a zigzag-edge graphene flake (zgf), using hubbard model in the nearest neighbor approximation within the framework of the green function’s technique and landauer formalism. the system considered consists of electrode/ (zgf)/electrode, in which the electrodes are chosen to be armchair nanoribbons. the study was performed for two types of ele...

Abstract The percolation plays an essential role in the physics of plateau transition, localization, and breakdown quantum Hall (QH) systems. In practice, it always exists probably due to sample imperfections has be addressed before realizing full potentials topological electronics qubits. Here, we investigate cause, distribution, number a anomalous (QAH) insulator anti-Hall bar geometry with t...