Strong Exciton-Phonon Coupling as a Fingerprint of Magnetic Ordering in van der Waals Layered CrSBr
arXiv:2308.04895 · doi:10.1021/acsnano.3c07236
Abstract
The layered, air-stable van der Waals antiferromagnetic compound CrSBr exhibits pronounced coupling between its optical, electronic, and magnetic properties. As an example, exciton dynamics can be significantly influenced by lattice vibrations through exciton-phonon coupling. Using low-temperature photoluminescence spectroscopy, we demonstrate the effective coupling between excitons and phonons in nanometer-thick CrSBr. By careful analysis, we identify that the satellite peaks predominantly arise from the interaction between the exciton and an optical phonon with a frequency of 118 cm-1 (~14.6 meV) due to the out-of-plane vibration of Br atoms. Power-dependent and temperature-dependent photoluminescence measurements support exciton-phonon coupling and indicate a coupling between magnetic and optical properties, suggesting the possibility of carrier localization in the material. The presence of strong coupling between the exciton and the lattice may have important implications for the design of light-matter interactions in magnetic semiconductors and provides new insights into the exciton dynamics in CrSBr. This highlights the potential for exploiting exciton-phonon coupling to control the optical properties of layered antiferromagnetic materials.
21 pages, together with suppl
References in corpus (12)
- Magnetic Order and Symmetry in the 2D Semiconductor CrSBr
- Magneto-optics in a van der Waals magnet tuned by self-hybridized polaritons
- The bulk van der Waals layered magnet CrSBr is a quasi-1D material
- Quasi 1D electronic transport in a 2D magnetic semiconductor
- Dynamic Magnetic Crossover at the Origin of the Hidden-Order in van der Waals Antiferromagnet CrSBr
- Probing defects and spin-phonon coupling in CrSBr via resonant Raman scattering
- Sensing the local magnetic environment through optically active defects in a layered magnetic semiconductor
- Raman scattering signatures of the strong spin-phonon coupling in the bulk magnetic van der Waals material CrSBr
- Paramagnetic Electronic Structure of CrSBr: Comparison between Ab Initio GW Theory and Angle-Resolved Photoemission Spectroscopy
- Dielectric tunability of magnetic properties in orthorhombic ferromagnetic monolayer CrSBr
- Ferromagnetic interlayer coupling in CrSBr crystals irradiated by ions
- Tuning exciton recombination rates in doped transition metaldichalcogenides
Cited by in corpus (17)
- Magnon-mediated exciton-exciton interaction in a van der Waals antiferromagnet
- Large Exciton Binding Energy in the Bulk van der Waals Magnet CrSBr
- Giant exchange splitting in the electronic structure of A-type 2D antiferromagnet CrSBr
- Intrinsic magnetic properties of the layered antiferromagnet CrSBr
- Raman Polarization Switching in CrSBr
- Mott insulating phase and coherent-incoherent crossover across magnetic phase transition in 2D antiferromagnetic CrSBr
- Distinct Magneto-Optical Response of Frenkel and Wannier Excitons in CrSBr
- Resonance Raman Scattering and Anomalous Anti-Stokes Phenomena in CrSBr
- Probing Short-Range Correlations in the van der Waals Magnet CrSBr by Small-Angle Neutron Scattering
- Magnetic Correlation Spectroscopy in CrSBr
- Van der Waals CrSBr alloys with tunable magnetic and optical properties
- Directional Flow of Confined Polaritons in CrSBr
- Exciton transport driven by spin excitations in an antiferromagnet
- Observation of anisotropic dispersive dark exciton dynamics in CrSBr
- Interplay of vibrational, electronic, and magnetic states in CrSBr
- Exciton-Selective Phonon Coupling in a Lead Halide Perovskite
- Unveiling Photoluminescence Signatures of Magneto-Optical Coupling in Layered Hybrid Manganese Chloride Perovskites