Colossal magneto-excitonic effects in 2D van der Waals magnetic semiconductor CrSBr

2D magnetic semiconductors, which intrinsically couple a rich landscape of magnetic orders with tightly bound electron-hole pairs (excitons), present an exciting platform to investigate the interplay between optical and magnetic phenomena at the atomic scale. In such systems, the strength of magneto...

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Bibliographic Details
Published in:arXiv.org 2024-09
Main Authors: Komar, R, Łopion, A, Goryca, M, Rybak, M, Woźniak, T, Mosina, K, Söll, A, Sofer, Z, Pacuski, W, Faugeras, C, Birowska, M, Kossacki, P, Kazimierczuk, T
Format: Article
Language:English
Subjects:
Excitation spectra
Excitons
Holes (electron deficiencies)
Magnetic properties
Magnetic semiconductors
Optical properties
Spectral sensitivity
Online Access:Get full text
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Summary:2D magnetic semiconductors, which intrinsically couple a rich landscape of magnetic orders with tightly bound electron-hole pairs (excitons), present an exciting platform to investigate the interplay between optical and magnetic phenomena at the atomic scale. In such systems, the strength of magneto-optical effects determines how deeply the magnetic properties can be revealed. Here, we report the observation of remarkably strong magneto-excitonic effects in the 2D magnetic semiconductor CrSBr that allow probing its magnetic order with unprecedented sensitivity. By investigating optical transitions above the fundamental exciton energy, we discover a massive spectral shift approaching 100 meV under applied magnetic fields - an order of magnitude larger than previously observed magneto-excitonic responses. Our comprehensive magneto-optical experiments accompanied by detailed DFT calculations indicate the possible origin of the transitions exhibiting such intriguing behavior. These findings open avenues for exploiting magneto-excitonic phenomena at newly accessible regimes, enabling novel opto-spintronic applications previously limited by weak magnetic responses.
ISSN:2331-8422