Controlling Coulomb correlations and fine structure of quasi-one-dimensional excitons by magnetic order
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F25%3A43932195" target="_blank" >RIV/60461373:22310/25:43932195 - isvavai.cz</a>
Result on the web
<a href="https://www.nature.com/articles/s41563-025-02120-1" target="_blank" >https://www.nature.com/articles/s41563-025-02120-1</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/s41563-025-02120-1" target="_blank" >10.1038/s41563-025-02120-1</a>
Alternative languages
Result language
angličtina
Original language name
Controlling Coulomb correlations and fine structure of quasi-one-dimensional excitons by magnetic order
Original language description
Many surprising properties of quantum materials result from Coulomb correlations defining electronic quasiparticles and their interaction chains. In van der Waals layered crystals, enhanced correlations have been tailored in reduced dimensions, enabling excitons with giant binding energies and emergent phases including ferroelectric, ferromagnetic and multiferroic orders. Yet, correlation design has primarily relied on structural engineering. Here we present quantitative experiment-theory proof that excitonic correlations can be switched through magnetic order. By probing internal Rydberg-like transitions of excitons in the magnetic semiconductor CrSBr, we reveal their binding energy and a dramatic anisotropy of their quasi-one-dimensional orbitals manifesting in strong fine-structure splitting. We switch the internal structure from strongly bound, monolayer-localized states to weakly bound, interlayer-delocalized states by pushing the system from antiferromagnetic to paramagnetic phases. Our analysis connects this transition to the exciton's spin-controlled effective quantum confinement, supported by the exciton's dynamics. In future applications, excitons or even condensates may be interfaced with spintronics; extrinsically switchable Coulomb correlations could shape phase transitions on demand.
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
10402 - Inorganic and nuclear chemistry
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 MATERIALS
ISSN
1476-1122
e-ISSN
1476-4660
Volume of the periodical
24
Issue of the periodical within the volume
3
Country of publishing house
GB - UNITED KINGDOM
Number of pages
17
Pages from-to
384-390
UT code for WoS article
001425341400001
EID of the result in the Scopus database
2-s2.0-85218134450