Anisotropic excitons in van der Waals magnet CrSBr

ORAL

Abstract

We report anisotropic excitons in few layer van der Waals magnet CrSBr, where excitons serve as the main carriers of optical excitations. In addition to the well-documented exciton around 900 nm (1.37 eV), we identify a previously unreported higher energy exciton at 700 nm (1.77 eV) through absorption spectrum analysis. A key facet of our investigation involves the application of polarization-resolved photoluminescence excitation (PLE) spectroscopy to comprehensively understand the anisotropic attributes excitons in thin CrSBr. Furthermore, our research reveals different behaviors of these excitons with respect to their response to antiferromagnetic resonances, by subjecting the sample to a magnetic field and analyzing both photoluminescence and absorption spectrum. This work advances our understanding of van der Waals magnet CrSBr and their potential application in emerging technologies.

* NSF DMR-2130544

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Presenters

  • Sichao Yu

    City College of New York, The City University of New York

Authors

  • Sichao Yu

    City College of New York, The City University of New York

  • Biswajit Datta

    City College of New York

  • Pratap C Adak

    City College of New York

  • Vinod M Menon

    City College of New York

  • Jiamin Quan

    Advanced Science Research Center, CUNY, The City University of New York

  • Wei Wang

    Advanced Science Research Center, CUNY

  • Andrea Alu

    Advanced Science Research Center, CUNY, The Graduate Center, City University of

  • Kseniia Mosina

    University of Chemistry and Technology Prague

  • Zdeněk Sofer

    University of Chemistry and Technology Prague, University of Chemistry and Technology, Prague, Institute of Chemistry and Technology, Prague, .