Probing ultrafast photo-induced dynamics of the exchange energy in a Heisenberg antiferromagnet

Kurzanzeige
dc.contributor.authorBatignani, Giovanni
dc.contributor.authorBossini, Davide
dc.contributor.authorDi Palo, N.
dc.contributor.authorFerrante, Carino
dc.contributor.authorPontecorvo, Emanuele
dc.contributor.authorCerullo, Giulio
dc.contributor.authorKimel, Aleksei V.
dc.contributor.authorScopigno, Tullio
dc.date.accessioned2021-04-01T13:05:19Z
dc.date.available2021-04-01T13:05:19Z
dc.date.issued2015eng
dc.description.abstractManipulating the macroscopic phases of solids using ultrashort light pulses has resulted in spectacular phenomena, including metal–insulator transitions1,2,3, superconductivity4 and subpicosecond modification of magnetic order5. The development of this research area strongly depends on the understanding and optical control of fundamental interactions in condensed matter, in particular the exchange interaction. However, disentangling the timescales relevant for the contributions of the exchange interaction and spin dynamics to the exchange energy, Eex, is a challenge. Here, we introduce femtosecond stimulated Raman scattering to unravel the ultrafast photo-induced dynamics of magnetic excitations at the edge of the Brillouin zone. We find that femtosecond laser excitation of the antiferromagnet KNiF3 triggers a spectral shift of the two-magnon line, the energy of which is proportional to Eex. By unravelling the photo-induced modification of the two-magnon line frequency from a dominating nonlinear optical effect, we find that Eex is increased by the electromagnetic stimulus.eng
dc.description.versionpublishedde
dc.identifier.doi10.1038/nphoton.2015.121eng
dc.identifier.urihttps://kops.uni-konstanz.de/handle/123456789/53336
dc.language.isoengeng
dc.rightsterms-of-use
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dc.subject.ddc530eng
dc.titleProbing ultrafast photo-induced dynamics of the exchange energy in a Heisenberg antiferromagneteng
dc.typeJOURNAL_ARTICLEde
dspace.entity.typePublication
kops.citation.bibtex
@article{Batignani2015Probi-53336,
  year={2015},
  doi={10.1038/nphoton.2015.121},
  title={Probing ultrafast photo-induced dynamics of the exchange energy in a Heisenberg antiferromagnet},
  volume={9},
  issn={1749-4885},
  journal={Nature Photonics},
  pages={506--510},
  author={Batignani, Giovanni and Bossini, Davide and Di Palo, N. and Ferrante, Carino and Pontecorvo, Emanuele and Cerullo, Giulio and Kimel, Aleksei V. and Scopigno, Tullio}
}
kops.citation.iso690BATIGNANI, Giovanni, Davide BOSSINI, N. DI PALO, Carino FERRANTE, Emanuele PONTECORVO, Giulio CERULLO, Aleksei V. KIMEL, Tullio SCOPIGNO, 2015. Probing ultrafast photo-induced dynamics of the exchange energy in a Heisenberg antiferromagnet. In: Nature Photonics. Springer Nature. 2015, 9, pp. 506-510. ISSN 1749-4885. eISSN 1749-4893. Available under: doi: 10.1038/nphoton.2015.121deu
kops.citation.iso690BATIGNANI, Giovanni, Davide BOSSINI, N. DI PALO, Carino FERRANTE, Emanuele PONTECORVO, Giulio CERULLO, Aleksei V. KIMEL, Tullio SCOPIGNO, 2015. Probing ultrafast photo-induced dynamics of the exchange energy in a Heisenberg antiferromagnet. In: Nature Photonics. Springer Nature. 2015, 9, pp. 506-510. ISSN 1749-4885. eISSN 1749-4893. Available under: doi: 10.1038/nphoton.2015.121eng
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    <dcterms:abstract xml:lang="eng">Manipulating the macroscopic phases of solids using ultrashort light pulses has resulted in spectacular phenomena, including metal–insulator transitions1,2,3, superconductivity4 and subpicosecond modification of magnetic order5. The development of this research area strongly depends on the understanding and optical control of fundamental interactions in condensed matter, in particular the exchange interaction. However, disentangling the timescales relevant for the contributions of the exchange interaction and spin dynamics to the exchange energy, E&lt;sub&gt;ex&lt;/sub&gt;, is a challenge. Here, we introduce femtosecond stimulated Raman scattering to unravel the ultrafast photo-induced dynamics of magnetic excitations at the edge of the Brillouin zone. We find that femtosecond laser excitation of the antiferromagnet KNiF&lt;sub&gt;3&lt;/sub&gt; triggers a spectral shift of the two-magnon line, the energy of which is proportional to E&lt;sub&gt;ex&lt;/sub&gt;. By unravelling the photo-induced modification of the two-magnon line frequency from a dominating nonlinear optical effect, we find that E&lt;sub&gt;ex&lt;/sub&gt; is increased by the electromagnetic stimulus.</dcterms:abstract>
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kops.sourcefieldNature Photonics. Springer Nature. 2015, <b>9</b>, pp. 506-510. ISSN 1749-4885. eISSN 1749-4893. Available under: doi: 10.1038/nphoton.2015.121deu
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kops.sourcefield.plainNature Photonics. Springer Nature. 2015, 9, pp. 506-510. ISSN 1749-4885. eISSN 1749-4893. Available under: doi: 10.1038/nphoton.2015.121eng
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