Tunneling spectroscopy as a probe of fractionalization in 2D magnetic heterostructures

Abstract

In this paper we develop the theory for 2D-to-2D tunneling spectroscopy aided by magnetic or quantum-order excitations, and apply it to the description of van-der-Waals heterostructures of graphene/ultrathin $\alpha -{\mathrm{RuCl}}_3$. We study the behavior of both the differential conductance and the inelastic electron tunneling spectrum (IETS) of these heterostructures. The IETS in particular exhibits features, such as the gap of continuum spinon excitations and Majorana bound states, whose energies scale {\it cubicly} with the applied magnetic field. Such scaling, which exists for a relatively wide range of fields, is at odds with the linear one exhibited by conventional magnons and can be used to prove the existence of Kitaev quantum spin liquids.

arXiv comment13 pages main, 13 pages appendices, 9 figures

References in corpus (72)

• The electronic properties of graphene
• Magic-angle graphene superlattices: a new platform for unconventional superconductivity
• Non-Abelian Anyons and Topological Quantum Computation
• Layer-dependent Ferromagnetism in a van der Waals Crystal down to the Monolayer Limit
• Anyons in an exactly solved model and beyond
• Discovery of intrinsic ferromagnetism in 2D van der Waals crystals
• Correlated Insulator Behaviour at Half-Filling in Magic Angle Graphene Superlattices
• Moire bands in twisted double-layer graphene
• Field-effect tunneling transistor based on vertical graphene heterostructures
• Mott Insulators in the Strong Spin-Orbit Coupling Limit: From Heisenberg to a Quantum Compass and Kitaev Models
• Quantum Spin Liquids
• Magnetic 2D materials and heterostructures
• Quantum Spin Liquid States
• Electrical Control of 2D Magnetism in Bilayer CrI3
• Giant Tunneling Magnetoresistance in Spin-Filter van der Waals Heterostructures
• Controlling magnetism in 2D CrI3 by electrostatic doping
• Kitaev-Heisenberg Model on Honeycomb Lattice: Possible Exotic Phases in Iridium Oxides $A_2$IrO${}_3$
• Probing magnetism in 2D van der Waals crystalline insulators via electron tunneling
• Commensurate-incommensurate transition for graphene on hexagonal boron nitride
• Atomically thin boron nitride: a tunnelling barrier for graphene devices
• Majorana quantization and half-integer thermal quantum Hall effect in a Kitaev spin liquid
• Proximate Kitaev Quantum Spin Liquid Behaviour in α-RuCl${}_3$
• $\alpha$-RuCl3: a Spin-Orbit Assisted Mott Insulator on a Honeycomb Lattice
• Relevance of the Heisenberg-Kitaev model for the honeycomb lattice iridates A_2IrO_3
• Neutron tomography of magnetic Majorana fermions in a proximate quantum spin liquid
• Generic spin model for the honeycomb iridates beyond the Kitaev limit
• Stacking-Dependent Magnetism in Bilayer CrI${}_3$
• Very Large Tunneling Magnetoresistance in Layered Magnetic Semiconductor CrI${}_3$
• Challenges in Design of Kitaev Materials: Magnetic Interactions from Competing Energy Scales
• Probing magnetism in 2D materials at the nanoscale with single spin microscopy
• Magnetic order in $\alpha$-RuCl${}_3$: a honeycomb lattice quantum magnet with strong spin-orbit coupling
• Direct photoluminescence probing of ferromagnetism in monolayer two-dimensional CrBr3
• Anyons and the quantum Hall effect - a pedagogical review
• Experimental realization of a 2D fractional quantum spin liquid
• Exact results for spin dynamics and fractionization in the Kitaev Model
• Valley Manipulation by Optically Tuning the Magnetic Proximity Effect in WSe${}_2$/CrI${}_3$ Heterostructures
• Atomically Thin CrCl3: An in-Plane Layered Antiferromagnetic Insulator
• Pyrochlore Antiferromagnet: A Three-Dimensional Quantum Spin Liquid
• Hyper-honeycomb iridate $\beta$-Li2IrO3 as a platform for Kitaev magnetism
• Evidence for a Field-induced Quantum Spin Liquid in $\alpha$-RuCl${}_3$
• Dynamics of a two-dimensional quantum spin liquid: signatures of emergent Majorana fermions and fluxes
• Topological spin excitations in honeycomb ferromagnet CrI${}_3$
• Kitaev magnetism in honeycomb RuCl3 with intermediate spin-orbit coupling
• Magnon-assisted tunnelling in van der Waals heterostructures based on CrBr3
• Spin-orbit excitation energies, anisotropic exchange, and magnetic phases of honeycomb RuCl3
• Phase Diagram of $\alpha$-RuCl${}_3$ in an in-plane Magnetic Field
• Spin-wave excitations evidencing the Kitaev interaction in single crystalline $\alpha$-RuCl${}_3$
• First-Principles Study of the Honeycomb-Lattice Iridates Na2IrO3 in the Presence of Strong Spin-Orbit Interaction and Electron Correlations
• Unusual thermal Hall effect in a Kitaev spin liquid candidate $\alpha$-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${}_3$
• Kitaev-Heisenberg-J2-J3 model for the iridates A2IrO3
• Raman Scattering Signatures of Kitaev Spin Liquids in A${}_2$ IrO${}_3$ Iridates
• Dynamics of Fractionalization in Quantum Spin Liquids
• Probing $\alpha$-RuCl${}_3$ Beyond Magnetic Order: Effects of Temperature and Magnetic Field
• Finite field regime for a quantum spin liquid in $\alpha$-RuCl${}_3$
• Magnetoresistance of vertical Co-graphene-NiFe junctions controlled by charge transfer and proximity-induced spin splitting in graphene
• Clues and criteria for designing Kitaev spin liquid revealed by thermal and spin excitations of honeycomb iridates Na${}_2$IrO${}_3$
• Phonon-assisted resonant tunneling of electrons in graphene-boron nitride transistors
• Evidence for charge transfer and proximate magnetism in graphene/a-RuCl_3 heterostructures
• Large Thermal Hall Effect in $\alpha$-RuCl${}_3$: Evidence for Heat Transport by Kitaev-Heisenberg Paramagnons
• Ultralow-temperature thermal conductivity of the Kitaev honeycomb magnet $\alpha$-RuCl${}_3$ across the field-induced phase transition
• Spin Wave Analysis of Low-Temperature Thermal Hall Effect in the Candidate Kitaev Spin Liquid $\alpha$-RuCl${}_3$
• Kitaev materials beyond iridates: order by quantum disorder and Weyl magnons in rare-earth double perovskites
• Possible Structural Transformation and Enhanced Magnetic Fluctuations in Exfoliated $\alpha$-RuCl${}_3$
• ARPES study of the Kitaev Candidate $\alpha$-RuCl${}_3$
• Non-Abelian BF theory for 2+1 dimensional topological states of matter
• Field induced magnon excitation and in gap absorption of Kitaev candidate RuCl3
• Revealing frustrated local moment model for pressurized hyperhoneycomb iridate: paving a way toward quantum spin liquid
• Theory of a quantum spin liquid in hydrogen-intercalated honeycomb iridate, H3LiIr2O6
• Magnetoresistance in Co-hBN-NiFe tunnel junctions enhanced by resonant tunneling through single defects in ultrathin hBN barriers
• Resonant tunneling and the quasiparticle lifetime in graphene/boron nitride/graphene heterostructures

Cited by in corpus (20)

• Local Probes for Charge-Neutral Edge States in Two-Dimensional Quantum Magnets
• Tunneling spectroscopy of quantum spin liquids
• STM as a single Majorana detector of Kitaev's chiral spin liquid
• Scanning tunneling spectroscopy of Majorana zero modes in a Kitaev spin liquid
• Non-local spin correlation as a signature of Ising anyons trapped in vacancies of the Kitaev spin liquid
• Probing quantum spin liquids with a quantum twisting microscope
• Magnetoelectric generation of a Majorana-Fermi surface in Kitaev's honeycomb model
• Tunneling spectroscopic signatures of charge doping and associated Mott transition in $\alpha$-RuCl${}_3$ in proximity to graphite
• Probing magnetism in moiré heterostructures with quantum twisting microscopes
• Probing Majorana wavefunctions in Kitaev honeycomb spin liquids with second-order two-dimensional spectroscopy
• Field-driven spatiotemporal manipulation of Majorana zero modes in a Kitaev spin liquid
• Spin Seebeck Effect as a Probe for Majorana Fermions in Kitaev Spin Liquids
• Drag resistance mediated by quantum spin liquids
• Local spin-flip transitions induced by magnetic quantum impurities in two-dimensional magnets
• Emergent Hyper-Magic Manifold in Twisted Kitaev Bilayers
• Assessing bound states in a one-dimensional topological superconductor: Majorana versus Tamm
• Possible Realization of Kitaev Spin Liquids in van der Waals Heterostructures of $\alpha$-RuCl${}_3$ and Cr$X_3$ ($X$=Cl and I)
• Electric polarization near vortices in the extended Kitaev model
• Real-time control of non-Abelian anyons in Kitaev spin liquid under energy dissipation
• Vortex creation and control in the Kitaev spin liquid by local bond modulations