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Lecture Naoto Nagaosa


09 March 2011 FWN-Building 5113.0201, Nijenborgh 4, 9747 AG, Groningen
Speaker: Prof. Naoto Nagaosa
Affiliation: Department of Applied Physics, University of Tokyo,Cross-Correlated Materials Research Group and Correlated Electron Research Group, RIKEN
Title: Twisted spin conservation law and spin-orbit echo
Date: Mon Mar 7, 2011
Start: 14.00
Location: FWN-Building 5113.0201
Host: Maxim Mostovoy
Telephone: +31 50 363 3419


Due to the elastic scattering by disorder in the presence of the spin-orbit interaction, the spin information is considered to be lost beyond a spin lifetime, which represents the most serious obstacle in spintronics aiming at utilizing the spin/spin current. In this talk, I discuss that the nontrivial conservation law of "twisted spin" exists. This twisted spin preserves the information of spin because it is an adiabatic invariant with respect to change in the spin-orbit interaction. As a consequence, a new echo phenomenon, spin-orbit echo, is predicted, i.e., the spin is recovered when the spin-orbit interaction is reduced adiabatically even after spin relaxation due to disorder scatterings has occurred.

Last modified:22 October 2012 2.30 p.m.