Spin Polarized Current Generation from Quantum Dots without Magnetic Fields
DSpace/Manakin Repository
Spin Polarized Current Generation from Quantum Dots without Magnetic Fields
| Title: | Spin Polarized Current Generation from Quantum Dots without Magnetic Fields |
| Author: |
Halperin, Bertrand; Krich, Jacob
Note: Order does not necessarily reflect citation order of authors. |
| Citation: | Krich, Jacob J. and Bertrand I. Halperin. 2008. Spin polarized current generation from quantum dots without magnetic fields. Physical Review B 78, no. 3: 035338. |
| Full Text & Related Files: |
Halperin_SpinPolarized.pdf (247.6Kb; PDF) 
|
| Abstract: | An unpolarized charge current passing through a chaotic quantum dot with spin-orbit coupling can produce a spin-polarized exit current without magnetic fields or ferromagnets. We use random matrix theory to estimate the typical spin polarization as a function of the number of channels in each lead in the limit of large spin-orbit coupling. We find rms spin polarizations up to 45% with one input channel and two output channels. Finite temperature and dephasing both suppress the effect, and we include dephasing effects using a variation of the third lead model. If there is only one channel in the output lead, no spin polarization can be produced, but we show that dephasing lifts this restriction. |
| Published Version: | http://dx.doi.org/10.1103/PhysRevB.78.035338 |
| Other Sources: | http://arxiv.org/abs/0801.2592v2 |
| Terms of Use: | This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP |
| Citable link to this page: | http://nrs.harvard.edu/urn-3:HUL.InstRepos:3110943 |
This item appears in the following Collection(s)
-
FAS Scholarly Articles [5137]
Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University
Contact administrator regarding this item (to report mistakes or request changes)
