Quasi 1D electronic transport in a 2D magnetic semiconductor

Abstract

We investigate electronic transport through exfoliated multilayers of CrSBr, a 2D semiconductor that is attracting attention because of its magnetic properties. We find an extremely pronounced anisotropy that manifests itself in qualitative and quantitative differences of all quantities measured along the in-plane \textit{a} and \textit{b} crystallographic directions. In particular, we observe a qualitatively different dependence of the conductivities ${\sigma }_a$ and ${\sigma }_b$ on temperature and gate voltage, accompanied by orders of magnitude differences in their values (${\sigma }_b$/${\sigma }_a\approx 3\cdot 10^2-10^5$ at low temperature and large negative gate voltage). We also find a different behavior of the longitudinal magnetoresistance in the two directions, and the complete absence of the Hall effect in transverse resistance measurements. These observations appear not to be compatible with a description in terms of conventional band transport of a 2D doped semiconductor. The observed phenomenology -- together with unambiguous signatures of a 1D van Hove singularity that we detect in energy resolved photocurrent measurements -- indicate that electronic transport through CrSBr multilayers is better interpreted by considering the system as formed by weakly and incoherently coupled 1D wires, than by conventional 2D band transport. We conclude that CrSBr is the first 2D semiconductor to show distinctly quasi 1D electronic transport properties.

arXiv commentAccepted for publication in Advanced Materials

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Cited by in corpus (45)

• One-Dimensional van der Waals Quantum Materials -- State of the Art and Perspectives
• The bulk van der Waals layered magnet CrSBr is a quasi-1D material
• Dynamic Magnetic Crossover at the Origin of the Hidden-Order in van der Waals Antiferromagnet CrSBr
• Multistep magnetization switching in orthogonally twisted ferromagnetic monolayers
• Probing the spin dimensionality in single-layer CrSBr van der Waals heterostructures by magneto-transport measurements
• Spin waves and magnetic exchange Hamiltonian in CrSBr
• Probing defects and spin-phonon coupling in CrSBr via resonant Raman scattering
• Magnon straintronics in the 2D van der Waals ferromagnet CrSBr from first-principles
• 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
• Strong Exciton-Phonon Coupling as a Fingerprint of Magnetic Ordering in van der Waals Layered CrSBr
• Nanoscale magnetism and magnetic phase transitions in atomically thin CrSBr
• Gate-controlled Magnetotransport and Electrostatic Modulation of Magnetism in 2D magnetic semiconductor CrPS${}_4$
• 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
• 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
• Anisotropic effects in two-dimensional materials
• Magneto-optical sensing of the pressure driven magnetic ground states in bulk CrSBr
• Designing magnetic properties in CrSBr through hydrostatic pressure and ligand substitution
• Intrinsic magnetic properties of the layered antiferromagnet CrSBr
• Charge Density Wave and Ferromagnetism in Intercalated CrSBr
• Programmable Magnetic Hysteresis in Orthogonally-Twisted Two-Dimensional CrSBr Magnets via Stacking Engineering
• Nonvolatile Electric Control of Antiferromagnet CrSBr
• Magnetism-induced band-edge shift as mechanism for magnetoconductance in CrPS${}_4$ transistors
• Strain Engineering of Magnetoresistance and Magnetic Anisotropy in CrSBr
• Synthesis and Anisotropic Magnetic Properties of LiCrTe${}_2$ Single Crystals with a Triangular-Lattice Antiferromagnetic Structure
• Surface-Dominated Quantum Metric-Induced Nonlinear Transport in the Layered Antiferromagnet CrSBr
• Efficient Soft-Chemical Synthesis of Large van-der-Waals Crystals of the Room-Temperature Ferromagnet 1T-CrTe2
• Defect complexes in CrSBr revealed through electron microscopy and deep learning
• Ferromagnetism above 200 K in organic-ion intercalated CrSBr
• Controlling the Magnetic Properties of the van der Waals Multiferroic Crystals Co${}_{1-x}$Ni${}_x$I${}_2$
• Magnon sensing of NO, NO${}_2$ and NH${}_3$ gas capture on CrSBr monolayer
• Directional Flow of Confined Polaritons in CrSBr
• Exciton transport driven by spin excitations in an antiferromagnet
• Hall response of locally correlated two-dimensional electrons at low density
• One-Dimensional Materials Supported in Two-Dimensional van der Waals Metal-Organic Frameworks with Optical Anisotropy Switching via Twist-Engineering
• Observation of anisotropic dispersive dark exciton dynamics in CrSBr
• Effects of forward disorder on quasi-1D superconductors
• Growth of Large Crystals of Janus Phase RhSeCl Using Self-Selecting Vapour Growth
• Space-Charge-Limited van der Waals Spin Transistor
• Magneto-Excitonic Duality From Monolayer to Trilayer CrSBr
• Excitonic optical absorption in strained monolayer CrSBr
• Room Temperature Anisotropic Photoresponse in Low-Symmetry van der Waals Semiconductor CrPS${}_4$
• Crystallographic Orientation-Dependent Magnetotransport in the Layered Antiferromagnet -- CrSBr