Sound propagation in charge- and spin-density waves

A. Virosztek, Kazumi Maki

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We study sound propagation in a quasi-one-dimensional charge- or spin-density waves (CDW or SDW) within mean-field theory. The quasiparticle damping is explicitly included in terms of randomly distributed impurities. In general the ionic potential is screened by both the quasiparticle and the phason. However, when the CDW or the SDW is pinned, the phason cannot participate in the screening. Therefore the depinning of the CDW or the SDW by an electric field always decreases the sound velocity. Further, due to the diffusion pole in correlation functions, the quasiparticle contribution depends crucially on /Dq2, where and q are the frequency and the wave vector of the sound wave and D is the diffusion constant. The present theory describes many features of sound propagation in the quasi-one-dimensional CDW systems.

Original languageEnglish
Pages (from-to)7055-7060
Number of pages6
JournalPhysical Review B
Volume41
Issue number10
DOIs
Publication statusPublished - 1990

Fingerprint

Spin density waves
Charge density waves
sound propagation
Wave propagation
Acoustic waves
acoustic velocity
sound waves
Mean field theory
poles
screening
damping
Acoustic wave velocity
impurities
electric fields
Poles
Screening
Damping
Electric fields
Impurities

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Sound propagation in charge- and spin-density waves. / Virosztek, A.; Maki, Kazumi.

In: Physical Review B, Vol. 41, No. 10, 1990, p. 7055-7060.

Research output: Contribution to journalArticle

Virosztek, A. ; Maki, Kazumi. / Sound propagation in charge- and spin-density waves. In: Physical Review B. 1990 ; Vol. 41, No. 10. pp. 7055-7060.
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