Field-Induced Discommensuration in Charge Density Waves in o-TaS_3

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Author(s)

Abstract

We report a synchrotron X-ray study of charge density waves (CDWs) in an o-TaS_3 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 q_c=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.

Journal

  • Journal of the Physical Society of Japan

    Journal of the Physical Society of Japan 77(9), "093708-1"-"093708-4", 2008-09-15

    The Physical Society of Japan (JPS)

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Codes

  • NII Article ID (NAID)
    110006933469
  • NII NACSIS-CAT ID (NCID)
    AA00704814
  • Text Lang
    ENG
  • Article Type
    SHO
  • ISSN
    00319015
  • NDL Article ID
    9646024
  • NDL Source Classification
    ZM35(科学技術--物理学)
  • NDL Call No.
    Z53-A404
  • Data Source
    CJP  NDL  NII-ELS 
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