The bulk van der Waals layered magnet CrSBr is a quasi-1D material

Abstract

Correlated quantum phenomena in one-dimensional (1D) systems that exhibit competing electronic and magnetic order are of strong interest for studying fundamental interactions and excitations, such as Tomonaga-Luttinger liquids and topological orders and defects with properties completely different from the quasiparticles expected in their higher-dimensional counterparts. However, clean 1D electronic systems are difficult to realize experimentally, particularly magnetically ordered systems. Here, we show that the van der Waals layered magnetic semiconductor CrSBr behaves like a quasi-1D material embedded in a magnetically ordered environment. The strong 1D electronic character originates from the Cr-S chains and the combination of weak interlayer hybridization and anisotropy in effective mass and dielectric screening with an effective electron mass ratio of $m_X^e/m_Y^e\sim 50$. This extreme anisotropy experimentally manifests in strong electron-phonon and exciton-phonon interactions, a Peierls-like structural instability and a Fano resonance from a van Hove singularity of similar strength of metallic carbon nanotubes. Moreover, due to the reduced dimensionality and interlayer coupling, CrSBr hosts spectrally narrow (1 meV) excitons of high binding energy and oscillator strength that inherit the 1D character. Overall, CrSBr is best understood as a stack of weakly hybridized monolayers and appears to be an experimentally attractive candidate for the study of exotic exciton and 1D correlated many-body physics in the presence of magnetic order.

main: 16 pages, 5 figures; SI: 15 pages, 9 figures

References in corpus (10)

• Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
• Advanced capabilities for materials modelling with Quantum ESPRESSO
• Fermi surface nesting and the origin of Charge Density Waves in metals
• Unusual Scaling Laws of the Band Gap and Optical Absorption of Phosphorene Nanoribbons
• Triaxial magnetic anisotropy in the two-dimensional ferromagnetic semiconductor 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
• Magnetically brightened dark electron-phonon bound states in a van der Waals antiferromagnet
• Enhanced dimerization of TiOCl under pressure: spin-Peierls - to - Peierls transition
• Hysteretic magnetoresistance and thermal bistability in a magnetic two-dimensional hole system

Cited by in corpus (50)

• Magneto-optics in a van der Waals magnet tuned by self-hybridized polaritons
• Doping-control of excitons and magnetism in few-layer CrSBr
• Strong Exciton-Phonon Coupling as a Fingerprint of Magnetic Ordering in van der Waals Layered 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
• Magnon-mediated exciton-exciton interaction in a van der Waals antiferromagnet
• Large Exciton Binding Energy in the Bulk van der Waals Magnet CrSBr
• Anisotropic effects in two-dimensional materials
• Giant exchange splitting in the electronic structure of A-type 2D antiferromagnet CrSBr
• Charge transfer and asymmetric coupling of MoSe${}_2$ valleys to the magnetic order of CrSBr
• Magneto-optical sensing of the pressure driven magnetic ground states in bulk CrSBr
• Ferromagnetic interlayer coupling in CrSBr crystals irradiated by ions
• Charge Density Wave and Ferromagnetism in Intercalated CrSBr
• Intrinsic magnetic properties of the layered antiferromagnet CrSBr
• Charge transfer-induced Lifshitz transition and magnetic symmetry breaking in ultrathin CrSBr crystals
• Raman Polarization Switching in CrSBr
• Spin-mechanical coupling in 2D antiferromagnet CrSBr
• Magnetic Exciton-Polariton with Strongly Coupled Atomic and Photonic Anisotropies
• Spin-chirality-driven second-harmonic generation in two-dimensional magnet CrSBr
• Strain Engineering of Magnetoresistance and Magnetic Anisotropy in CrSBr
• Local Fluctuations in Cavity Control of Ferroelectricity
• Electrically tunable correlated domain wall network in twisted bilayer graphene
• Distinct Magneto-Optical Response of Frenkel and Wannier Excitons in CrSBr
• Interplay of energy and charge transfer in WSe2/CrSBr heterostructures
• Surface-Dominated Quantum Metric-Induced Nonlinear Transport in the Layered Antiferromagnet CrSBr
• Resonance Raman Scattering and Anomalous Anti-Stokes Phenomena in CrSBr
• Defect complexes in CrSBr revealed through electron microscopy and deep learning
• Magnetically Modulated Electrical Switching in an Antiferromagnetic Transistor
• Tunable Nanophotonic Devices and Cavities based on a Two-Dimensional Magnet
• Ferromagnetism above 200 K in organic-ion intercalated CrSBr
• Twist Engineering of Anisotropic Excitonic and Optical Properties of a Two-Dimensional Magnetic Semiconductor
• Excitons and trions in CrSBr bilayers
• Magnetic Correlation Spectroscopy in CrSBr
• Exciton transport driven by spin excitations in an antiferromagnet
• Intrinsic defects as a source of $\text{n}$-type conductivity in CrSBr
• One-Dimensional Materials Supported in Two-Dimensional van der Waals Metal-Organic Frameworks with Optical Anisotropy Switching via Twist-Engineering
• Layered Topological Antiferromagnetic Metal at Room Temperature -- YbMn${}_2$Ge${}_2$
• Discovery of an ultrastable antiferromagnetic two-dimensional CrF3 phase with anisotropic quasi-one-dimensional mechanical, electronic, and thermal properties
• Observation of anisotropic dispersive dark exciton dynamics in CrSBr
• Massive Discovery of Low-Dimensional Materials from Universal Computational Strategy
• Interplay of vibrational, electronic, and magnetic states in CrSBr
• Exciton-spin interactions in antiferromagnetic charge-transfer insulators
• Boltzmann transport theory of magnon-exciton drag
• Theory of interaction-induced charge order in CrSBr
• Light-induced ultrafast magnetization dynamics in van der Waals antiferromagnetic CrSBr
• Magneto-Excitonic Duality From Monolayer to Trilayer CrSBr
• Coupled-wire descriptions of unconventional quantum states in twisted nanostructures
• Bond-Length-Driven Magnetic Transition in Quasi-One-Dimensional CrSb$X_3$ ($X$=S, Se)
• Excitonic optical absorption in strained monolayer CrSBr
• Crystallographic Orientation-Dependent Magnetotransport in the Layered Antiferromagnet -- CrSBr