Scanning probe techniques can be used to probe electronic properties at the nanoscale, to shed light on the physics of nanoscale devices: Graphene is of great interest for its promise in both applied (e.g. spintronics and valleytronics) and fundamental research (e.g. quantum Hall and Dirac ...
Electron flow in circular graphene quantum dots搜索 Electron f l ow in circular graphene quantum dotsC. Schulz, R. L. Heinisch, and H. FehskeInstitut für Physik, Ernst-Moritz-Arndt-Universität Greifswald, 17487 Greifswald, Germany(Dated: March 12, 2018)AbstractWe study the electron propagatio...
1a) but a non-quantizing magnetic field \(B\) is applied perpendicular to graphene15. The field leads to an asymmetry in the potential created by the viscous flow around the injection contact (insets of Fig. 1e, f). The viscous contribution asymmetric in \(B\) is called the viscous ...
The focusing of electric current by a single p-n junction in graphene is theoretically predicted. Precise focusing may be achieved by fine-tuning the densities of carriers on the n- and p-sides of the junction to equal values. This finding may be useful for the engineering of electronic lens...
Electron flow in circular graphene quantum dots We study the electron propagation in a circular electrostatically defined quantum dot in graphene. Solving the scattering problem for a plane Dirac electro... C Schulz,RL Heinisch,H Fehske - 《Quantum Matter》 被引量: 2发表: 2014年 Electronic prope...
As a group, particles can cross obstacles in a more coordinated and efficient way, thus enhancing conductivity capabilities. To test the electron flow configuration, the research team turned to graphene, which is a one-atom-thick sheet of carbon, and which can be made exceptionally clean. ...
In this picture, inertial corrections to the electronic flow arise naturally effectively producing electron-phonon interactions. The strength of the interaction is controlled by a coupling constant, which is temperature independent. We apply this model to graphene and recover satisfactorily the linear ...
Produced by the viscous flow, vorticity can drive electric current against an applied field, resulting in a negative nonlocal voltage. We argue that the latter may play the same role for the viscous regime as zero electrical resistance does for superconductivity. Besides offering a diagnostic that...
Motivated by recent advances in fabricating graphene nanostructures, we find that an electron can be trapped in Z-shaped graphene nanoconstriction with zigzag edges. The central section of the constriction operates as a single-level quantum dot, as the current flow towards the adjunct sections (...
This flow of electrons due to the potential gradient between the electrodes, results in current generation. For the number of electrons harvested in the anode and transfer to the cathode, an equal amount of protons (H+) or other positive ions migrate through the chambers across the IEMs to ...