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  Manipulating magnons via ultrafast magnetization modulation

Singh, N., Elliott, P., Dewhurst, J. K., & Sharma, S. (2021). Manipulating magnons via ultrafast magnetization modulation. Physical Review B, 103(13): 134402. doi:10.1103/PhysRevB.103.134402.

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PhysRevB.103.134402.pdf (Publisher version), 2MB
 
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https://doi.org/10.1103/PhysRevB.103.134402 (Publisher version)
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 Creators:
Singh, N.1, Author
Elliott, P.1, Author
Dewhurst, J. K.2, Author              
Sharma, S.1, Author
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1External Organizations, ou_persistent22              
2Max Planck Institute of Microstructure Physics, Max Planck Society, ou_2415691              

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 Abstract: We demonstrate how fundamental properties of magnons may be manipulated using femtosecond laser pulses by performing ab initio real-time time-dependent density functional theory simulations. To illustrate this, we show how the spin-wave dynamics in Fe50Ni50 can be manipulated in three different ways by tailoring the applied laser pulse to excite optically induced intersublattice transfer (OISTR): (1) element-selective destruction of magnon modes depending on the laser intensity, (2) delay-dependent freezing of the magnon mode into a transient noncollinear state (where the delay is in the pulse peak with respect to the start of simulations), and (3) OISTR-driven renormalization of the optical magnon frequency. Harnessing such processes would significantly speed up magnonic devices.

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 Dates: 20212021-04-01
 Publication Status: Published in print
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 103 (13) Sequence Number: 134402 Start / End Page: - Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008