Signatures of Ultrafast Reversal of Excitonic Order in Ta_{2}NiSe_{5}.

@article{Ning2020SignaturesOU,
  title={Signatures of Ultrafast Reversal of Excitonic Order in Ta\_\{2\}NiSe\_\{5\}.},
  author={H. Ning and O. Mehio and M. Buchhold and T. Kurumaji and G. Refael and J. Checkelsky and D. Hsieh},
  journal={Physical review letters},
  year={2020},
  volume={125 26},
  pages={
          267602
        }
}
In the presence of electron-phonon coupling, an excitonic insulator harbors two degenerate ground states described by an Ising-type order parameter. Starting from a microscopic Hamiltonian, we derive the equations of motion for the Ising order parameter in the phonon coupled excitonic insulator Ta_{2}NiSe_{5} and show that it can be controllably reversed on ultrashort timescales using appropriate laser pulse sequences. Using a combination of theory and time-resolved optical reflectivity… Expand

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References

SHOWING 1-10 OF 20 REFERENCES
Field Theory of Non-Equilibrium Systems
1. Introduction 2. Bosons 3. Single particle quantum mechanics 4. Classical stochastic systems 5. Bosonic fields 6. Dynamics of collisionless plasma 7. Kinetics of Bose condensates 8. Dynamics ofExpand
{m
TLDR
The master programme in Applied Geology aims to provide comprehensive knowledge based on various branches of Geology, with special focus on Applied geology subjects in the areas of Geomorphology, Structural geology, Hydrogeology, Petroleum Geologists, Mining Geology), Remote Sensing and Environmental geology. Expand
Phys
  • Rev. Lett. 73, 3243
  • 1994
Nature Communications 9
  • 4322
  • 2018
Phys
  • Rev. B 97, 115105
  • 2018
Phys
  • Rev. B 98, 235127
  • 2018
Phys
  • Rev. B 97, 115154
  • 2018
Sci
  • Adv. 4
  • 2018
Nature Communications 8
  • 14408
  • 2017
Phys
  • Rev. Lett. 119, 247601
  • 2017
...
1
2
...