Magnon Interference Tunneling Spectroscopy as a Probe of 2D Magnetism
Asimpunya Mitra, Alberto Corticelli, Pedro Ribeiro, Paul McClarty
Abstract
Probing two-dimensional single-layer quantum magnets remains a significant challenge. In this Letter, we propose exploiting tunneling spectroscopy in the presence of magnetic impurities to obtain information about the magnon dispersion relations in analogy to quasiparticle interference in nonmagnetic materials. We show that this technique can be used to establish the dispersion relations even for frustrated magnets, where the presence of an impurity generally leads to a nontrivial spin texture. Finally, we consider the problem of establishing Chern magnon bands in 2D magnets showing how tunable impurities allow one to probe the nature of the surface states.
Topics & Concepts
MagnonCondensed matter physicsQuasiparticleMagnetismQuantum tunnellingSpectroscopyPhysicsImpurityFerromagnetismMagnetInterference (communication)Dispersion (optics)Spin (aerodynamics)Scanning tunneling spectroscopyMaterials scienceQuantum mechanicsSuperconductivityThermodynamicsChannel (broadcasting)EngineeringElectrical engineeringTopological Materials and PhenomenaPhysics of Superconductivity and MagnetismQuantum and electron transport phenomena