1 / 10

Understanding Spin Currents in Quantum Rings

Explore spin currents in quantum rings and the impact of spin-orbit interaction in atoms and crystals. Learn about spintronics and spin-orbit effects in nanostructures, including Rashba and Dresselhaus interactions. Study nanoelectronic devices and spin interference research at RU.

bcarter
Download Presentation

Understanding Spin Currents in Quantum Rings

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Spin currents in quantum rings Andrei Manolescu School of Science and Engineering

  2. What is Spin The electron rotates around the nucleus  orbit e e The electron rotates around itself  spin  magnetic dipole

  3. WHAT is spin-orbit interaction In atoms The motion seen by the electron: The nucleus rotates around the electronand creates a magnetic field The motion seen from the lab frame: The electron rotates around the nucleus e e e In crystals

  4. What is spintronics The electron has electric charge  electric current  Electronics: information carried by electric signals The electron has spin  magnetic (spin) current  Spintronics: information carried by magnetic signals The spin-orbit interaction allows the influence of electric fields on spin currents

  5. NANOELECTRONIC DEVICES GaAs/AlGaAs heterostructure Quantum wires Quantum ring

  6. TYPES OF SPIN-ORBIT Interaction in nanostructures Rashba: due to the electric field of the vertical confinement Dresselhaus: due to the electric field of the crystal

  7. SPIN CURRENTS INDUCED IN NANORINGS Ring exposed to two dipolar electric fields with a relative angle 0 0 Spin current Charge current M. Niţă, D.C. Marinescu, A. Manolescu, V. Guðmundsson, Phys. Rev. B 2011

  8. SPIN INTERFERRENCE WITH R+D SOI

  9. The nanophysics group at RU Andrei Manolescu Sigurdur Erlingsson Halldor Svavarsson Agust Valfells Gunnar Thorgilsson Kristinn Torfason Anton Heidar Thorolfsson Csaba Daday

More Related