Effects of scattering area shape on spin conductance in a four-terminal spin-Hall setup

Abstract

We study spin conductance in a ballistic and quasi-ballistic two dimensional electron system with Rasbha spin-orbit coupling. The system has a four-terminal geometry with round corners at the connection to the leads. It is found that by going from sharp corners to more round corners in the ballistic system the energy depended spin conductance goes from being relatively flat to a curve showing a series of minima and maxima. It is also found that when changing the size of the terminal area by modifying the roundness of the terminal corners the maxima and minima in the transverse spin conductance are shifted in energy. This shift is due increased (decreased) energy for smaller (larger) terminal area. These results were also found to be reasonably stable in quasi-ballistic systems.

7 pages, 8 figures

References in corpus (14)

• Can Non-Equilibrium Spin Hall Accumulation be Induced in Ballistic Nanostructures?
• All-Electric Quantum Point Contact Spin Valve
• Generating Spin Currents in Semiconductors with the Spin Hall Effect
• Decoherence of transported spin in multichannel spin-orbit coupled spintronic devices: Scattering approach to spin density matrix from the ballistic to the localized regime
• Mesoscopic Spin Hall Effect in Multiprobe Ballistic Spin-Orbit Coupled Semiconductor Bridges
• Intersubband-induced spin-orbit interaction in quantum wells
• Spin susceptibilities, spin densities and their connection to spin-currents
• Transverse Spin-Orbit Force in the Spin Hall Effect in Ballistic Semiconductor Wires
• Nature of Spin Hall Effect in a finite Ballistic Two-Dimensional System with Rashba and Dresselhaus spin-orbit interaction
• Spin Accumulation in Diffusive Conductors with Rashba and Dresselhaus Spin-Orbit Interaction
• Enhanced spin Hall effect by tuning antidot potential: Proposal for a spin filter
• Spin Hall effect due to intersubband-induced spin-orbit interaction in symmetric quantum wells
• Can the conductance of an adiabatic ballistic constriction be lower than $2e^2/h$?
• Landauer-Büttiker Study of the Anomalous Hall Effect