Plasmons in semiconductor and topological insulator wires with large dielectric constant

Yi Huang, Chao Hsiang Sheu, B. I. Shklovskii

Research output: Contribution to journalArticlepeer-review


The dispersion law of plasmons running along thin wires with radius a is known to be practically linear. We show that in wires with a dielectric constant κ much larger than that of its environment κe, such dispersion law crosses over to a dispersionless three-dimensional-like law when the plasmon wavelength becomes shorter than the length ( Formula Presented) at which the electric field lines of a point charge exit from the wire to the environment. This happens both in trivial semiconductor wires and wires of three-dimensional topological insulators.

Original languageEnglish (US)
Pages (from-to)470-475
Number of pages6
JournalLow Temperature Physics
Issue number6
StatePublished - Jun 1 2022

Bibliographical note

Funding Information:
We are grateful to A. Chaplik, M. Entin, M. Fogler, A. McLeod, and B. Skinner for reading the manuscript and useful comments. Y. H. was partially supported by the William I. Fine Theoretical Physics Institute.

Publisher Copyright:
© 2022 Author(s).


  • dielectric constant
  • plasmon dispersion law
  • semiconductor
  • topological insulator wires


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