Twist Engineering of Anisotropic Excitonic and Optical Properties of a Two-Dimensional Magnetic Semiconductor

Abstract

Two dimensional (2D) van der Waals (vdW) magnetic semiconductors are a new class of quantum materials for studying the emergent physics of excitons and spins in the 2D limit. Twist engineering provides a powerful tool to manipulate the fundamental properties of 2D vdW materials. Here, we show that twist engineering of the anisotropic ferromagnetic monolayer semiconductor, CrSBr, leads to bilayer magnetic semiconductors with continuously tunable magnetic moment, dielectric anisotropy, exciton energy and linear dichroism. We furthermore provide a model for exciton energy in the media with tunable anisotropy. These results advance fundamental studies on 2D vdW materials and open doors to applications to nano-optics, twistronics, and spintronics.

10 pages, 4 figures

References in corpus (22)

• Magnetic 2D materials and heterostructures
• Moiré heterostructures as a condensed matter quantum simulator
• Magnetic Order and Symmetry in the 2D Semiconductor CrSBr
• Exciton-Coupled Coherent Magnons in a 2D Semiconductor
• Probing the influence of dielectric environment on excitons in monolayer WSe2: Insight from high magnetic fields
• 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
• Twist engineering of the two-dimensional magnetism in double bilayer chromium triiodide homostructures
• Tunable Exciton-Hybridized Magnon Interactions in a Layered Semiconductor
• Multistep magnetization switching in orthogonally twisted ferromagnetic monolayers
• Evidence of Noncollinear Spin Texture in Magnetic Moiré Superlattices
• Magnetic imaging with spin defects in hexagonal boron nitride
• Electrically tunable moiré magnetism in twisted double bilayers of chromium triiodide
• Doping-control of excitons and magnetism in few-layer CrSBr
• Nanoscale magnetism and magnetic phase transitions in atomically thin CrSBr
• Characterization of room-temperature in-plane magnetization in thin flakes of CrTe${}_2$ with a single spin magnetometer
• Progress and Prospects in Two-Dimensional Magnetism of van der Waals Materials
• Observation of stacking engineered magnetic phase transitions within moiré supercells of twisted van der Waals magnets
• Large Exciton Binding Energy in the Bulk van der Waals Magnet CrSBr
• Macroscopic Tunneling Probe of Moiré Spin Textures in Twisted CrI${}_3$
• Nitrogen-vacancy magnetometry of CrSBr by diamond membrane transfer
• Magnetic Exciton-Polariton with Strongly Coupled Atomic and Photonic Anisotropies