Interlayer breathing and shear modes in few-trilayer MoS2 and WSe2

Abstract

Two-dimensional (2D) layered transition metal dichalcogenides (TMDs) have recently attracted tremendous interest as potential valleytronic and nano-electronic materials, in addition to being well-known as excellent lubricants in the bulk. The interlayer van der Waals (vdW) coupling and low frequency phonon modes, and how they evolve with the number of layers, are important for both the mechanical and electrical properties of 2D TMDs. Here we uncover the ultra-low frequency interlayer breathing and shear modes in few-layer MoS2 and WSe2, prototypical layered TMDs, using both Raman spectroscopy and first principles calculations. Remarkably, the frequencies of these modes can be perfectly described using a simple linear chain model with only nearest-neighbour interactions. We show that the derived in-plane (shear) and out-of-plane (breathing) force constants from experiment remain the same from two-layer 2D crystals to the bulk materials, suggesting that the nanoscale interlayer frictional characteristics of these excellent lubricants should be independent of the number of layers.

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Cited by in corpus (120)

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• Charge transport and mobility engineering in two-dimensional transition metal chalcogenide semiconductors
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• Rapid and reliable thickness identification of two-dimensional nanosheets using optical microscopy
• Helicity resolved Raman scattering of MoS2, MoSe2, WS2 and WSe2 atomic layers
• The Interlayer Shear Modes in Twisted Multi-layer Graphenes: Interlayer coupling, Davydov Splitting and Intensity Resonance
• Vibrational and optical properties of MoS${}_2$: from monolayer to bulk
• Thickness-Dependent Differential Reflectance Spectra of Monolayer and Few-Layer MoS2, MoSe2, WS2 and WSe2
• Analytical approach to excitonic properties of MoS2
• Observation of interlayer phonon modes in van der Waals heterostructures
• Anomalous polarization dependence of Raman scattering and crystallographic orientation of black phosphorus
• Observation of Low-frequency Interlayer Breathing Modes in Few-layer Black Phosphorus
• Interlayer electronic hybridization leads to exceptional thickness-dependent vibrational properties in few-layer black phosphorus
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• Splitting of interlayer shear modes and photon energy dependent anisotropic Raman response in $N$-layer ReSe${}_2$ and ReS${}_2$
• Interlayer Interactions in Anisotropic Atomically-thin Rhenium Diselenide
• Coupling and stacking order of ReS2 atomic layers revealed by ultralow-frequency Raman spectroscopy
• Raman signatures of inversion symmetry breaking and structural phase transition in type-II Weyl semimetal MoTe2
• Resonance effects in the Raman scattering of mono- and few layers MoSe${}_2$
• Mapping of Low-Frequency Raman Modes in CVD-Grown Transition Metal Dichalcogenides: Layer Number, Stacking Orientation and Resonant Effects
• Interface coupling in twisted multilayer graphene by resonant Raman spectroscopy of layer breathing modes
• Layer- and doping-tunable long range ferromagnetic order-ing in two-dimensional CrS2
• Anomalous excitonic resonance Raman effects in few-layer MoS2
• Davydov splitting and excitonic resonance effects in Raman spectra of few-Layer MoSe2
• Unified description of the optical phonon modes in $N$-layer MoTe${}_2$
• Phonon-derived ultrafast relaxation of spin-valley polarized states in MoS_{2}
• Polytypism and Unexpected Strong Interlayer Coupling of two-Dimensional Layered ReS2
• First-principles investigation of graphene/MoS2 bilayer heterostructures using Tkatchenko-Scheffler van der Waals method
• Raman Signatures of Polytypism in Molybdenum Disulfide
• Activation of new Raman modes by inversion symmetry breaking in type II Weyl semimetal candidate T'-MoTe2
• Raman spectrum of Janus transition metal dichalcogenide monolayers WSSe and MoSSe
• Light matter interaction in transition metal dichalcogenides and their heterostructures
• Anomalous Frequency Trends in MoS2 Thin Films Attributed to Surface Effects
• Strain-shear coupling in bilayer MoS2
• Quantum-Confined Electronic States arising from Moiré Pattern of MoS2-WSe2 Hetero-bilayers
• Large Frequency Change with Thickness in Interlayer Breathing Mode - Significant Interlayer Interactions in Few Layer Black Phosphorus
• Physical origin of Davydov splitting and resonant Raman spectroscopy of Davydov components in multilayer MoTe2
• Observation of Optical and Electrical In-plane Anisotropy in High-mobility Few-layer ZrTe5
• A Comprehensive Multiphonon Spectral Analysis in MoS2
• Newly observed first-order resonant Raman modes in few-layer MoS${}_2$
• Zone-center phonons of bulk, few-layer, and monolayer 1T-TaS${}_2$: Detection of the commensurate charge density wave phase through Raman scattering
• Light induced sub-picosecond topological phase transition in MoTe2
• Low-Frequency Raman Spectroscopy of Few-Layer 2H-SnS2
• A Gaussian Treatment for the Friction Issue of Lennard-Jones Potential in Layered Materials: Application to Friction between Graphene, MoS2 and Black Phosphorus
• Collective Excitations in 2D Materials
• On-Stack Two-Dimensional Conversion of MoS2 into MoO3
• Direct versus indirect band gap emission and exciton-exciton annihilation in atomically thin molybdenum ditelluride (MoTe${}_2$)
• Temperature-activated layer-breathing vibrations in few-layer graphene
• Phonons in Twisted Transition Metal Dichalcogenide Bilayers ("Twistnonics"): Ultra-soft Phasons, and a transition from Superlubric to Pinned Phase
• Structural Phase Transition and Interlayer Coupling in Few-Layer 1T' and Td MoTe2
• Ultralow-frequency collective compression mode and strong interlayer coupling in multilayer black phosphorus
• Large-scale mapping of moiré superlattices by Raman imaging of interlayer breathing mode and moiré phonons
• Stacking-Dependent Interlayer Phonons in 3R and 2H MoS${}_2$
• Weakly Trapped, Charged, and Free Excitons in Single-Layer MoS2 in the Presence of Defects, Strain, and Charged Impurities
• Terahertz phonon engineering with van der Waals heterostructures
• Observation of anisotropic interlayer Raman modes in few-layer ReS2
• Dimensional crossover of acoustic phonon lifetime in $2H$-MoSe${}_2$
• Inter-valley dark trion states with spin lifetimes of 150 ns in WSe${}_2$
• Observation of forbidden phonons and dark excitons by resonance Raman scattering in few-layer WS${}_2$
• Probing the uniaxial strains in MoS${}_2$ using polarized Raman spectroscopy: A first-principles study
• Stacking-dependent shear modes in trilayer graphene
• Interlayer bond polarizability model for stacking-dependent low-frequency Raman scattering in layered materials
• Substrate-free layer-number identification of two-dimensional materials: A case of Mo${}_{0.5}$W${}_{0.5}$S${}_2$ alloy
• Polytypism in Few-Layer Gallium Selenide
• Direct calculation of the linear thermal expansion coefficients of MoS2 via symmetry-preserving deformations
• Interlayer Coupling in Two-Dimensional Semiconductor Materials
• Zone-folded longnitude acoustic phonons driving self-trapped state emission in colloidal CdSe nanoplate superlattice
• Resonant Raman and photoluminescence spectra of suspended molybdenum disulfide
• Excitonic Resonance Effects and Davydov Splitting in Circularly Polarized Raman Spectra of Few-Layer WSe2
• Determination of the thickness and orientation of few-layer tungsten ditelluride using polarized Raman spectroscopy
• Electron-phonon and phonon-phonon anharmonic interactions in 2H-MoX2 (X=S, Te): A comprehensive Resonant Raman study
• Vibrational and dielectric properties of the bulk transition metal dichalcogenides
• Interface-Confined Doubly Anisotropic Oxidation of Two-Dimensional MoS2
• Thickness-dependent Kapitza resistance in multilayered graphene and other two-dimensional crystals
• Layer Dependence of Stacking Order in Nonencapsulated Few-layer CrI3
• Simultaneous Generation of Direct- and Indirect-Gap Photoluminescence in Multilayer MoS2 Bubbles
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• Ultrafast coherent interlayer phonon dynamics in atomically thin layers of MnBi2Te4
• Quantum dot behavior in transition metal dichalcogenides nanostructures
• Resonant quenching of Raman scattering due to out-of-plane A${}_{1g}$/A'${}_1$ modes in few-layer MoTe${}_2$
• Ultrafast carrier-lattice interactions and interlayer modulations of Bi2Se3 by X-ray free electron laser diffraction
• Rigid-layer Raman-active modes in $N$-layer Transition Metal Dichalcogenides: interlayer force constants and hyperspectral Raman imaging
• Ultrafast exciton relaxation in monolayer transition metal dichalcogenides
• Optical spectroscopy of interlayer coupling in artificially stacked MoS2 layers
• New insights in the lattice dynamics of monolayers, bilayers, and trilayers of WSe2 and unambiguous determination of few-layer-flakes' thickness
• The optical response of artificially twisted MoS${}_2$ bilayers
• Davydov Splitting, Resonance Effect and Phonon Dynamics in CVD grown Layered MoS2
• Raman scattering from the bulk inactive out-of-plane B${}_{2\text{g}}^1$ mode in few-layer MoTe${}_2$
• Anisotropic Electron-Photon-Phonon Coupling in Layered MoS2
• Defect-Moderated Oxidative Etching of MoS2
• Quantum Transport Characteristics of Lateral pn-Junction of Single Layer TiS3
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• Experimental demonstration of the suppression of optical phonon splitting in 2D materials by Raman spectroscopy
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• Suppression of the Shear Raman Mode in Defective Bilayer MoS2
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• Terahertz emission from transient currents and coherent phonons in layered MoSe${}_2$ and WSe${}_2$
• Group Theory analysis of phonons in two-dimensional Transition Metal Dichalcogenides
• Electron-mediated anharmonicity and its role in the Raman spectrum of graphene
• Mesoscopic Stacking Reconfigurations in Stacked van der Waals Film
• PARPHOM: PARallel PHOnon calculator for Moiré systems
• Observation of van der Waals phonons in the single-layer cuprate (Bi,Pb)${}_2$(Sr,La)${}_2$CuO${}_{6+\delta }$
• Efficacious symmetry-adapted atomic displacement method for lattice dynamical studies
• Long wavelength interdomain phonons and instability of dislocations in small-angle twisted bilayers
• Giant Shear Displacement by Light-Induced Raman Force in Bilayer Graphene
• Polarization and driving force analysis of coherent optical shear phonons in graphite
• Quasi-bound layer-breathing phonons inside perfect dislocations of lattice-relaxed twisted bilayers
• Tunable phononic coupling in excitonic quantum emitters
• Light-induced shear phonon splitting and instability in bilayer graphene
• Phonon Renormalization in Reconstructed MoS${}_2$ Moiré Superlattices