Ultrafast Exciton Dynamics in the Atomically Thin van der Waals Magnet CrSBr
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F24%3A43929959" target="_blank" >RIV/60461373:22310/24:43929959 - isvavai.cz</a>
Result on the web
<a href="https://pubs.acs.org/doi/full/10.1021/acs.nanolett.3c05010" target="_blank" >https://pubs.acs.org/doi/full/10.1021/acs.nanolett.3c05010</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.nanolett.3c05010" target="_blank" >10.1021/acs.nanolett.3c05010</a>
Alternative languages
Result language
angličtina
Original language name
Ultrafast Exciton Dynamics in the Atomically Thin van der Waals Magnet CrSBr
Original language description
Among atomically thin semiconductors, CrSBr stands out as both its bulk and monolayer forms host tightly bound, quasi-one-dimensional excitons in a magnetic environment. Despite its pivotal importance for solid-state research, the exciton lifetime has remained unknown. While terahertz polarization probing can directly trace all excitons, independently of interband selection rules, the corresponding large far-field foci substantially exceed the lateral sample dimensions. Here, we combine terahertz polarization spectroscopy with near-field microscopy to reveal a femtosecond decay of paramagnetic excitons in a monolayer of CrSBr, which is 30 times shorter than the bulk lifetime. We unveil low-energy fingerprints of bound and unbound electron-hole pairs in bulk CrSBr and extract the nonequilibrium dielectric function of the monolayer in a model-free manner. Our results demonstrate the first direct access to the ultrafast dielectric response of quasi-one-dimensional excitons in CrSBr, potentially advancing the development of quantum devices based on ultrathin van der Waals magnets.
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
—
OECD FORD branch
10402 - Inorganic and nuclear chemistry
Result continuities
Project
<a href="/en/project/LL2101" target="_blank" >LL2101: Next Generation of 2D Monoelemental Materials</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
NANO LETTERS
ISSN
1530-6984
e-ISSN
1530-6992
Volume of the periodical
24
Issue of the periodical within the volume
14
Country of publishing house
US - UNITED STATES
Number of pages
7
Pages from-to
4101-4107
UT code for WoS article
001189144100001
EID of the result in the Scopus database
2-s2.0-85188430670