Unconventional plasmon-phonon coupling in graphene
M. Jablan, M. Solja\v{c}i\'c, H. Buljan
TL;DR
This paper investigates the unique polarization-dependent hybridization of plasmons and optical phonons in graphene, revealing unconventional coupling behaviors that differ from typical systems and depend on charge carrier concentration.
Contribution
It introduces a self-consistent linear response formalism to analyze polarization-specific plasmon-phonon coupling in graphene, highlighting novel polarization mixing effects.
Findings
Longitudinal plasmons couple only to transverse optical phonons.
Transverse plasmons couple only to longitudinal optical phonons.
Charge carrier concentration affects phonon frequency shifts.
Abstract
We calculate hybridization of plasmons and intrinsic optical phonons in graphene by using the self-consistent linear response formalism. We find that longitudinal plasmons (transverse magnetic modes) couple exclusively to transverse optical phonons, whereas graphene's transverse plasmons (transverse electric modes) couple only to longitudinal optical phonons. This mixing of polarizations is in contrast to the usual plasmon-phonon coupling in other systems. The resulting change in phonon frequencies increases (decreases) for transverse (longitudinal) phonons by increasing the concentration of charge carriers.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsGraphene research and applications · Quantum and electron transport phenomena · Molecular Junctions and Nanostructures