Phonon spectrum in a plasma crystal

S. Nunomura, J. Goree, S. Hu, X. Wang, A. Bhattacharjee, K. Avinash

Research output: Contribution to journalArticlepeer-review

180 Scopus citations


The phonon spectrum due to random particle motion in a plasma crystal was measured. The crystal was made of negatively charged microspheres immersed in a plasma at a low gas pressure. It was found that the phonons obey a dispersion relation that assumed a Yukawa interparticle potential. Also, the wave energy measured in Fourier space was found to be approximately twice as large as the particle kinetic energy measured in configuration space.

Original languageEnglish (US)
Article number035001
Pages (from-to)350011-350014
Number of pages4
JournalPhysical review letters
Issue number3
StatePublished - Jul 15 2002
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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