Spin Berry points as crucial for ultrafast demagnetization

  title={Spin Berry points as crucial for ultrafast demagnetization},
  author={G. P. Zhang and Y. H. Bai and Thomas F. George},
  journal={Modern Physics Letters B},
Laser-induced ultrafast demagnetization has puzzled researchers around the world for over two decades. Intrinsic complexity in electronic, magnetic, and phononic subsystems is difficult to understand microscopically. So far it is not possible to explain demagnetization using a single mechanism, which suggests a crucial piece of information still missing. In this paper, we return to a fundamental aspect of physics: spin and its change within each band in the entire Brillouin zone. We employ fcc… 
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