Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2003-09-09
Phys. Rev. B 69, 235310 (2004).
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
8 pages, 5 figures. Submitted to Phys. Rev. B, final version
Scientific paper
10.1103/PhysRevB.69.235310
Quantum interference effects in rings provide suitable means for controlling spin at mesoscopic scales. Here we apply such control mechanisms to coherent spin-dependent transport in one- and two-dimensional rings subject to Rashba spin-orbit coupling. We first study the spin-induced modulation of unpolarized currents as a function of the Rashba coupling strength. The results suggest the possibility of all-electrical spintronic devices. Moreover, we find signatures of Berry phases in the conductance previously unnoticed. Second, we show that the polarization direction of initially polarized, transmitted spins can be tuned via an additional small magnetic control flux. In particular, this enables to precisely reverse the polarization direction at half a flux quantum. We present full numerical calculations for realistic two-dimensional ballistic microstructures and explain our findings in a simple analytical model for one-dimensional rings.
Frustaglia Diego
Richter Klaus
No associations
LandOfFree
Spin interference effects in ring conductors subject to Rashba coupling does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Spin interference effects in ring conductors subject to Rashba coupling, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spin interference effects in ring conductors subject to Rashba coupling will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-390255