Magnon Interference Tunneling Spectroscopy as a Probe of 2D Magnetism

Area of Science:

• Condensed Matter Physics
• Quantum Magnetism
• Materials Science

Background:

• Probing two-dimensional (2D) single-layer quantum magnets presents significant experimental challenges.
• Understanding magnon dispersion relations is crucial for characterizing magnetic properties.

Purpose of the Study:

• To propose a novel tunneling spectroscopy technique for investigating magnon dispersion in 2D quantum magnets.
• To demonstrate the applicability of this method for frustrated magnetic systems and probing surface states.

Main Methods:

• Exploiting tunneling spectroscopy in the presence of magnetic impurities.
• Drawing analogies to quasiparticle interference techniques used in nonmagnetic materials.
• Analyzing the impact of impurities on spin texture and magnon bands.

Main Results:

• Successfully established a method to obtain magnon dispersion relations using tunneling spectroscopy.
• Demonstrated the technique's efficacy even for frustrated magnets with nontrivial spin textures.
• Showcased how tunable impurities can probe Chern magnon bands and surface states in 2D magnets.

Conclusions:

• Tunneling spectroscopy with magnetic impurities offers a viable route to probe 2D quantum magnet dynamics.
• The proposed method provides insights into complex magnetic structures and topological properties like Chern magnon bands.