in the present paper axial distributions of plasma and floating potentials, electron and iondensities and eedf have been measured in the dl region of a hg discharge constriction. an attempt hasbeen made for the resolution of opposing charged layer structures in dl. excitation processes in theconstriction region are studied. using the linearization method for the nonstationary balance equationss...

We theoretically investigate phosphorene zigzag nanoribbons as a platform for constriction engineering. In the presence of a constriction at one of the edges, quantum confinement of edge-protected states reveals conductance peaks, if the edge is uncoupled from the other edge. If the constriction is narrow enough to promote coupling between edges, it gives rise to Fano-like resonances as well as...

We show how the coupling between opposite edge states, which overlap in a constriction made of the topological insulator mercury telluride (HgTe), can be employed both for steering the charge flow into different edge modes and for controlled spin switching. Unlike in a conventional spin transistor, the switching does not rely on a tunable Rashba spin-orbit interaction, but on the energy depende...

We define constrictions on a surface as simple closed geodesic curves, i.e. curves whose length is locally minimal. They can be of great interests in order to cut the surface in smaller parts. In this paper, we present a method to detect constrictions on closed triangulated surfaces. Our algorithm is based on a progressive approach. First, the surface is simplified by repeated edge collapses. T...

The edge states of two-dimensional time-reversal topological insulators support a perfect helical conductance on wide ribbons due to the absence backscattering. Here, we study changes in transport properties insulator nanoribbons by introducing constriction along ribbon. This setup allows hybridize, leading reflections at ends constriction. We find that electronic running one can be reflected b...

Abstract We theoretically analyse a long constriction between the helical edge states of two-dimensional topological insulator. The is laterally tunnel-coupled to two superconductors and magnetic field applied perpendicularly plane Josephson current calculated analytically up second order in tunnel coupling both absence presence bias (DC AC currents). show that cases acquires an anomalous 4 π -...

Fabry-P\'{e}rot interferometry has emerged as a tool to probe anyon statistics in the quantum Hall effect. The interference phase is interpreted combination of quantized statistical and an Aharonov-Bohm phase, proportional device area charge anyons propagating along edge. This interpretation faces two challenges. First, edge states have finite width hence ill-defined. Second, multiple localized...

The flux periodicity of thermodynamic properties of an annulus in the fractional quantum hall state with a constriction is considered. It is found that φ 0-periodicity is obtained due to transfer of fractionally charged particles or composite fermions between the edges of the annulus, respectively. The result for the finite magnitude of the persistent current across a very strong constriction i...

Charge carriers in the quantum Hall regime propagate via one-dimensional conducting channels that form along the edges of a two-dimensional electron gas. Controlling their transmission through a gate-tunable constriction, also called quantum point contact, is fundamental for many coherent transport experiments. However, in graphene, tailoring a constriction with electrostatic gates remains chal...

Dynamin hydrolyzes GTP to constrict and sever membranes. Experimental advances bring dynamin into the realm of physics and reveal key roles for membrane tension and bending at the edge of the constriction.