Quenching of Spin Hall Effect in Ballistic nano-junctions

Abstract

We show that a nanometric four-probe ballistic junction can be used to check the presence of a transverse spin Hall current in a system with a Spin Orbit coupling not of the Rashba type, but rather due to the in-plane electric field. Indeed, the spin Hall effect is due to the presence of an effective small transverse magnetic field corresponding to the Spin Orbit coupling generated by the confining potential. The strength of the field and the junction shape characterize the quenching Hall regime, usually studied by applying semi-classical approaches. We discuss how a quantum mechanical relativistic effect, such as the Spin Orbit one, can be observed in a low energy system and explained by using classical mechanics techniques.

5 pages, 4 figures, PACS: 72.25.-b, 72.20.My, 73.50.Jt, to appear in Phys. Rev. B

References in corpus (5)

• Dissipationless Quantum Spin Current at Room Temperature
• On A Proper Definition of Spin Current
• Mesoscopic Spin Hall Effect in Multiprobe Ballistic Spin-Orbit Coupled Semiconductor Bridges
• Transverse Spin-Orbit Force in the Spin Hall Effect in Ballistic Semiconductor Wires
• Kinetic magnetoelectric effect in a 2D semiconductor strip due to boundary-confinement induced spin-orbit coupling

Cited by in corpus (4)

• Filtering of spin currents based on ballistic ring
• Enhanced spin Hall effect by tuning antidot potential: Proposal for a spin filter
• Spin Hall Effect and Spin Orbit coupling in Ballistic Nanojunctions
• Spin separation in a T ballistic nanojunction due to lateral-confinement-induced spin-orbit-coupling