Magneto-Excitonic Duality From Monolayer to Trilayer CrSBr

Abstract

Two-dimensional (2D) layered magnetic materials (LMMs) are a newly emerging class of van der Waals materials, opening new opportunities to study magneto-excitonic coupling. The air-stable, structurally and optically anisotropic A-type antiferromagnetic chromium sulfur bromide (CrSBr) is one of the most prominent examples of such LMMs. We investigate photoluminescence (PL) and PL excitation of mono- to tri-layers CrSBr and find that it exhibits a unique duplexity, supporting both Frenkel- and Wannier-Mott-like excitons. Our magneto-optical experiments reveal a similar excitonic response from the mono- and trilayer systems and a completely different signature in the bilayer flake. This shows a different origin of the low-lying excitonic species (A, A', and B) in the band structure. We confirm the robustness of the magneto-excitonic coupling in few-layer CrSBr. Our work enables a more comprehensive exploration of the dual excitonic behavior in 2D materials.

arXiv comment9 pages, 5 figures

References in corpus (34)

• Electric Field Effect in Atomically Thin Carbon Films
• Van der Waals heterostructures
• Layer-dependent Ferromagnetism in a van der Waals Crystal down to the Monolayer Limit
• Discovery of intrinsic ferromagnetism in 2D van der Waals crystals
• Excitons in atomically thin transition metal dichalcogenides
• Making graphene visible
• Graphene Nano-Ribbon Electronics
• Raman Spectroscopy of Graphene Edges
• Probing Excitonic Dark States in Single-layer Tungsten Disulfide
• Exciton Binding Energy of Monolayer WS2
• Magnetic Order and Symmetry in the 2D Semiconductor CrSBr
• Exciton Diamagnetic Shifts and Valley Zeeman Effects in Monolayer WS${}_2$ and MoS${}_2$ to 65 Tesla
• Layered Antiferromagnetism Induces Large Negative Magnetoresistance in the van der Waals Semiconductor CrSBr
• Revealing exciton masses and dielectric properties of monolayer semiconductors with high magnetic fields
• Measurement of high exciton binding energy in the monolayer transition-metal dichalcogenides WS2 and WSe2
• Optical properties of atomically thin transition metal dichalcogenides: Observations and puzzles
• Minimizing Residues and Strain in 2D Materials Transferred from PDMS
• 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
• Spin-correlated exciton-polaritons in a van der Waals magnet
• Energy spectrum of two-dimensional excitons in a non-uniform dielectric medium
• 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
• Doping-control of excitons and magnetism in few-layer CrSBr
• 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
• Giant exchange splitting in the electronic structure of A-type 2D antiferromagnet CrSBr
• Magneto-optical sensing of the pressure driven magnetic ground states in bulk CrSBr
• Exposing the trion's fine structure by controlling the carrier concentration in hBN-encapsulated MoS${}_2$
• A Theory for Colors of Strongly Correlated Electronic Systems
• Excitation-Dependent High-Lying Excitonic Exchange via Interlayer Energy Transfer from Lower-to-Higher Bandgap 2D Material
• Magnetic Correlation Spectroscopy in CrSBr