Optical markers of magnetic phase transition in CrSBr

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F23%3A43927506" target="_blank" >RIV/60461373:22310/23:43927506 - isvavai.cz</a>

Result on the web

<a href="https://pubs.rsc.org/en/content/articlehtml/2023/tc/d3tc01216f" target="_blank" >https://pubs.rsc.org/en/content/articlehtml/2023/tc/d3tc01216f</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/D3TC01216F" target="_blank" >10.1039/D3TC01216F</a>

Result language

angličtina

Original language name

Optical markers of magnetic phase transition in CrSBr

Original language description

Here, we investigate the role of the interlayer magnetic ordering of CrSBr in the framework of ab initio calculations and by using optical spectroscopy techniques. These combined studies allow us to unambiguously determine the nature of the optical transitions. In particular, photoreflectance measurements, sensitive to the direct transitions, have been carried out for the first time. We have demonstrated that optically induced band-to-band transitions visible in optical measurement are remarkably well assigned to the band structure by the momentum matrix elements and energy differences for the magnetic ground state (A-AFM). In addition, our study reveals significant differences in electronic properties for two different interlayer magnetic phases. When the magnetic ordering of A-AFM to FM is changed, the crucial modification of the band structure reflected in the direct-toindirect band gap transition and the significant splitting of the conduction bands along the G-Z direction are obtained. In addition, Raman measurements demonstrate a splitting between the in-plane modes B22g/B23g, which is temperature dependent and can be assigned to different interlayer magnetic states, corroborated by the DFT+U study. Moreover, the B2 2g mode has not been experimentally observed before. Finally, our results point out the origin of interlayer magnetism, which can be attributed to electronic rather than structural properties. Our results reveal a new approach for tuning the optical and electronic properties of van der Waals magnets by controlling the interlayer magnetic ordering in adjacent layers.

Czech name

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Czech description

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Type

J_imp - 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

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Materials Chemistry C

ISSN

2050-7526

e-ISSN

2050-7534

Volume of the periodical

11

Issue of the periodical within the volume

25

Country of publishing house

GB - UNITED KINGDOM

Number of pages

8

Pages from-to

8423-8430

UT code for WoS article

001000386900001

EID of the result in the Scopus database

2-s2.0-85161668481