Complete excitation spectrum of charge-density waves

Optical experiments on K0.3MoO3

L. Degiorgi, B. Alavi, G. Mihály, G. Grüner

Research output: Contribution to journalArticle

94 Citations (Scopus)

Abstract

Frequency-dependent conductivity measurements are reported in the charge-density-wave state of K0.3MoO3 and K0.3Mo1-xWxO3 alloys in the radio-frequency, microwave, millimeter-wave, and infrared spectral range. We identify several distinct features associated with the electrodynamics of the ground state. The dynamics of internal deformations of the collective mode, appearing at radio frequencies, together with the pinned-mode resonance at millimeter-wave frequencies are analyzed in detail and we evaluate the parameters that characterize these modes. We also identify a resonance in the far-infrared spectral range and suggest that it is due to bound charge-density-wave states. We account for the phonon spectra in terms of a phase-phonon description and also analyze the optical response due to single-particle excitations across the gap.

Original languageEnglish
Pages (from-to)7808-7819
Number of pages12
JournalPhysical Review B
Volume44
Issue number15
DOIs
Publication statusPublished - 1991

Fingerprint

Charge density waves
Millimeter waves
Infrared radiation
millimeter waves
Microwave frequencies
Electrodynamics
radio frequencies
Ground state
excitation
Experiments
electrodynamics
microwaves
conductivity
ground state

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Complete excitation spectrum of charge-density waves : Optical experiments on K0.3MoO3. / Degiorgi, L.; Alavi, B.; Mihály, G.; Grüner, G.

In: Physical Review B, Vol. 44, No. 15, 1991, p. 7808-7819.

Research output: Contribution to journalArticle

Degiorgi, L. ; Alavi, B. ; Mihály, G. ; Grüner, G. / Complete excitation spectrum of charge-density waves : Optical experiments on K0.3MoO3. In: Physical Review B. 1991 ; Vol. 44, No. 15. pp. 7808-7819.
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