Enhanced magnetization by defect-assisted exciton recombination in atomically thin CrCl3
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F24%3A43929997" target="_blank" >RIV/60461373:22310/24:43929997 - isvavai.cz</a>
Result on the web
<a href="https://journals.aps.org/prmaterials/abstract/10.1103/PhysRevMaterials.8.104402" target="_blank" >https://journals.aps.org/prmaterials/abstract/10.1103/PhysRevMaterials.8.104402</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevMaterials.8.104402" target="_blank" >10.1103/PhysRevMaterials.8.104402</a>
Alternative languages
Result language
angličtina
Original language name
Enhanced magnetization by defect-assisted exciton recombination in atomically thin CrCl3
Original language description
Two-dimensional semiconductors present unique opportunities to intertwine optical and magnetic functionalities and to tune these performances through defects and dopants. Here, we integrate exciton pumping into a quantum sensing protocol on nitrogen-vacancy centers in diamond to image the optically induced transient stray fields in few-layer, antiferromagnetic CrCl3. We discover that exciton recombination enhances the inplane magnetization of the CrCl3 layers, with a predominant effect in the surface monolayers. Concomitantly, time-resolved photoluminescence measurements reveal that nonradiative exciton recombination intensifies in atomically thin CrCl3 with tightly localized, nearly dipole-forbidden excitons and amplified surface-to-volume ratio. Supported by experiments under controlled surface exposure and density functional theory calculations, we interpret the magnetically enhanced state to result from a defect-assisted Auger recombination that optically activates electron transfer between water vapor related surface impurities and the spin-polarized conduction band. Our work validates defect engineering as a route to enhance intrinsic magnetism in single magnetic layers and opens an experimental platform for studying optically induced, transient magnetism in condensed matter systems.
Czech name
—
Czech description
—
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
Physical Review Materials
ISSN
2475-9953
e-ISSN
2475-9953
Volume of the periodical
8
Issue of the periodical within the volume
10
Country of publishing house
US - UNITED STATES
Number of pages
15
Pages from-to
—
UT code for WoS article
001329811500004
EID of the result in the Scopus database
2-s2.0-85205804309