Exciton transport driven by spin excitations in an antiferromagnet
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F25%3A43932956" target="_blank" >RIV/60461373:22310/25:43932956 - isvavai.cz</a>
Result on the web
<a href="https://www.nature.com/articles/s41565-025-02068-y" target="_blank" >https://www.nature.com/articles/s41565-025-02068-y</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/s41565-025-02068-y" target="_blank" >10.1038/s41565-025-02068-y</a>
Alternative languages
Result language
angličtina
Original language name
Exciton transport driven by spin excitations in an antiferromagnet
Original language description
Optical quasiparticles called magnetic excitons recently emerged in magnetic van der Waals materials. Akin to the highly effective strategies developed for electrons, the strong interactions of these excitons with the spin degree of freedom may provide innovative solutions for long-standing challenges in optics, such as steering the flow of energy and information. Here we demonstrate the transport of excitons by spin excitations in the van der Waals antiferromagnetic semiconductor CrSBr. Our observations reveal ultrafast, nearly isotropic exciton propagation, substantially enhanced at the N & eacute;el temperature, transient contraction and expansion of exciton clouds at low temperatures and superdiffusive behaviour in bilayer samples. These signatures largely defy description by commonly known exciton transport mechanisms. Instead, we attribute them to magnon currents induced by laser excitation. We propose that the drag forces exerted by these currents can effectively imprint characteristic properties of spin excitations onto the motion of excitons. The universal nature of the underlying magnon-exciton scattering promises the driving of excitons by magnons in other magnetic semiconductors and even in non-magnetic materials by proximity in heterostructures, merging the rich physics of magnetotransport with optics and photonics.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
21000 - Nano-technology
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Nature Nanotechnology
ISSN
1748-3387
e-ISSN
1748-3395
Volume of the periodical
21
Issue of the periodical within the volume
1
Country of publishing house
US - UNITED STATES
Number of pages
17
Pages from-to
nestránkováno
UT code for WoS article
001648969400001
EID of the result in the Scopus database
2-s2.0-105026291593