Possible Structural Transformation and Enhanced Magnetic Fluctuations in Exfoliated $\alpha$-RuCl${}_3$

Abstract

We present initial Raman spectroscopy experiments on exfoliated flakes of $\alpha$-RuCl${}_3$, from tens of nm thick down to single layers. Besides unexpectedly finding this material to be air stable, in the thinnest layers we observe the appearance with decreasing temperature of a symmetry-forbidden mode in crossed polarization, along with an anomalous broadening of a mode at 164 cm${}^{-1}$ that is known to couple to a continuum of magnetic excitations. This may be due to an enhancement of magnetic fluctuations and evidence for a distorted honeycomb lattice in single- and bi-layer samples.

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• Making graphene visible
• Mixed-Dimensional van der Waals Heterostructures
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• Interference effect on Raman spectrum of graphene on SiO_2/Si
• Spin-orbit excitation energies, anisotropic exchange, and magnetic phases of honeycomb RuCl3
• Crystal field splitting and correlation effect on the electronic structure of A2IrO3
• Phase Diagram of $\alpha$-RuCl${}_3$ in an in-plane Magnetic Field
• Spin-wave excitations evidencing the Kitaev interaction in single crystalline $\alpha$-RuCl${}_3$
• Anomalous thermal conductivity and magnetic torque response in the honeycomb magnet $\alpha$-RuCl${}_3$
• Field-induced quantum criticality in the Kitaev system $\alpha$-RuCl${}_3$
• Magnetic Excitations and Continuum of a Field-Induced Quantum Spin Liquid in $\alpha$-RuCl${}_3$
• Relation between Kitaev magnetism and structure in $\alpha$-RuCl${}_3$
• Magnetic properties of restacked 2D spin $\frac{1}{2}$ honeycomb RuCl${}_3$ nanosheets
• Unconventional spin dynamics in the honeycomb-lattice material $\alpha$-RuCl${}_3$: high-field ESR studies
• Magnetic thermal conductivity far above the Néel temperatures in the Kitaev-magnet candidate $\alpha$-RuCl${}_3$
• ARPES study of the Kitaev Candidate $\alpha$-RuCl${}_3$
• Stability of exfoliated Bi${}_2$Sr${}_2$Dy${}_x$Ca${}_{1-x}$Cu${}_2$O${}_{8+\delta }$ studied by Raman microscopy
• Novel magnetism on a honeycomb lattice in a-RuCl3 studied by muon spin rotation
• Low vibration high numerical aperture automated variable temperature Raman microscope
• Direct Observation of Long-range field-effect from gate tuning of non-local conductivity

Cited by in corpus (33)

• Electrical Control of 2D Magnetism in Bilayer CrI3
• Controlling magnetism in 2D CrI3 by electrostatic doping
• Hunting Majorana Fermions in Kitaev Magnets
• Magnon transport in quasi-two-dimensional van der Waals antiferromagnets
• High mobility in a van der Waals layered antiferromagnetic metal
• Evidence for charge transfer and proximate magnetism in graphene/a-RuCl_3 heterostructures
• Perspective on Metallic Antiferromagnets
• Electronic properties of α-RuCl3 in proximity to graphene
• Local Probes for Charge-Neutral Edge States in Two-Dimensional Quantum Magnets
• Optically Driven Magnetic Phase Transition of Monolayer RuCl3
• Tunneling spectroscopy of quantum spin liquids
• Beyond Kitaev physics in strong spin-orbit coupled magnets
• The range of non-Kitaev terms and fractional particles in RuCl${}_3$
• Electrical probes of the non-Abelian spin liquid in Kitaev materials
• Majorana-mediated spin transport without spin polarization in Kitaev quantum spin liquids
• Polarization-resolved Raman spectroscopy of α-RuCl3 and evidence of room temperature two-dimensional magnetic scattering
• Tunneling spectroscopy as a probe of fractionalization in 2D magnetic heterostructures
• A Cleanroom in a Glovebox
• Magnetic field-dependent low-energy magnon dynamics in $\alpha$-RuCl3
• Probing quantum spin liquids with a quantum twisting microscope
• Dimensionality dependent electronic structure of the exfoliated van der Waals antiferromagnet NiPS${}_3$
• Hydrated lithium intercalation into the Kitaev spin liquid candidate material $\alpha -$RuCl${}_3$
• Giant anisotropic magnetoresistance in few-layer α-RuCl3 tunnel junctions
• Resonant Inelastic X-ray Scattering from Electronic Excitations in $\alpha$-RuCl${}_3$ Nanolayers
• Emergent Hyper-Magic Manifold in Twisted Kitaev Bilayers
• Magnetostriction of α-RuCl3 flakes in the zigzag phase
• Possible Realization of Kitaev Spin Liquids in van der Waals Heterostructures of $\alpha$-RuCl${}_3$ and Cr$X_3$ ($X$=Cl and I)
• Optical contrast analysis of α-RuCl${}_3$ nanoflakes on oxidized silicon wafers
• Spin transistor built on 2D van der Waals heterostructures
• Strain-induced Landau levels of Majorana fermions in an anisotropically interacting Kitaev model on a honeycomb lattice
• Direct Evidence for Fermi Statistics from Proximity to the Kitaev Spin Liquid in RuCl3
• The Role of the Third Dimension in Searching Majorana Fermions in $\alpha$-RuCl${}_3$ via Phonons
• Epitaxial Growth and Band Structure of Antiferromagnetic Mott Insulator CeOI