Send to

Choose Destination
Phys Rev Lett. 2009 Nov 20;103(21):217401. Epub 2009 Nov 16.

Angular momentum conservation for coherently manipulated spin polarization in photoexcited NiO: an ab initio calculation.

Author information

Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, Box 3049, 67653 Kaiserslautern, Germany.


In an ultrafast laser-induced magnetization-dynamics scenario we demonstrate for the first time an exact microscopic spin-switch mechanism. Combining ab initio electronic many-body theory and quantum optics analysis we show in detail how the coherently induced material polarization for every elementary process leads to angular-momentum exchange between the light and the irradiated antiferromagnetic NiO. Thus we answer the long-standing question where the angular momentum goes. The calculation also predicts a dynamic Kerr effect, which provides a signature for monitoring spin dynamics, by simply measuring the transient rotation and ellipticity of the reflected light.

Supplemental Content

Full text links

Icon for American Physical Society
Loading ...
Support Center