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RESEARCH PRODUCT
Visualization of Moiré Magnons in Monolayer Ferromagnet
Somesh Chandra GanguliMarkus AaproShawulienu KezilebiekeMohammad AminiJose L. LadoPeter Liljerothsubject
monolayer chromium tribromideCondensed Matter - Materials Sciencemagneettiset ominaisuudetCondensed Matter - Mesoscale and Nanoscale PhysicsStrongly Correlated Electrons (cond-mat.str-el)moiré modulationscanning tunneling microscopy and spectroscopyMechanical EngineeringspektroskopiaMaterials Science (cond-mat.mtrl-sci)FOS: Physical sciencesBioengineeringGeneral ChemistrymikroskopiaCondensed Matter PhysicsCondensed Matter - Strongly Correlated ElectronsMesoscale and Nanoscale Physics (cond-mat.mes-hall)two-dimensional ferromagnetGeneral Materials Sciencemagnondescription
| openaire: EC/H2020/788185/EU//E-DESIGN Two-dimensional magnetic materials provide an ideal platform to explore collective many-body excitations associated with spin fluctuations. In particular, it should be feasible to explore, manipulate, and ultimately design magnonic excitations in two-dimensional van der Waals magnets in a controllable way. Here we demonstrate the emergence of moiré magnon excitations, stemming from the interplay of spin-excitations in monolayer CrBr3 and the moiré pattern arising from the lattice mismatch with the underlying substrate. The existence of moiré magnons is further confirmed via inelastic quasiparticle interference, showing the appearance of a dispersion pattern correlated with the moiré length scale. Our results provide a direct visualization in real-space of the dispersion of moiré magnons, demonstrating the versatility of moiré patterns in creating emergent many-body excitations. Peer reviewed
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2023-04-11 |