Field-induced discommensuration in charge density waves in o-TaS 3

Katsuhiko Inagaki, Masakatsu Tsubota, Kazuki Higashiyama, Koichi Ichimura, Satoshi Tanda, Kenichiro Yamamoto, Noriaki Hanasaki, Naoshi Ikeda, Yoshio Nogami, Takayoshi Ito, Hidenori Toyokawa

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Abstract

We report a synchrotron X-ray study of charge density waves (CDWs) in an o-TaS3 crystal. We found that two independent CDWs coexist in the temperature range of 130- 50K. These waves are incommensurate and commensurate CDWs with longitudinal wave vectors qc = 0.252c* and 0:250c*, respectively. The temperature and electric current dependences of the intensity of the two CDW satellites were measured. We found that the commensurate CDW was converted to the incommensurate CDW at 80K by inducing current flow. Our observation was interpreted in terms of the dynamics of topological defects. We determined the edge dislocation configuration from the electric current dependence of the intensity of the two CDWs. The result implies for the first time that discommensurations are induced in the commensurate CDW by applying an electric field.

Original languageEnglish
Article number093708
Journaljournal of the physical society of japan
Volume77
Issue number9
DOIs
Publication statusPublished - Sep 1 2008

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Keywords

  • Charge density wave
  • Discommensuration
  • o-TaS

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Inagaki, K., Tsubota, M., Higashiyama, K., Ichimura, K., Tanda, S., Yamamoto, K., Hanasaki, N., Ikeda, N., Nogami, Y., Ito, T., & Toyokawa, H. (2008). Field-induced discommensuration in charge density waves in o-TaS 3. journal of the physical society of japan, 77(9), [093708]. https://doi.org/10.1143/JPSJ.77.093708