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Properties of strained TaS3 samples in the state of charge density wave and in the normal state

  • S. G. Zybtsev
  • V. Ya. PokrovskiiEmail author
  • O. M. Zhigalina
  • D. N. Khmelenin
  • D. Starešinić
  • S. Šturm
  • E. Tchernychova
Electronic Properties of Solid

Abstract

The uniaxial strain of quasi-one-dimensional conductor whiskers of orthorhombic TaS3 at a strain higher than ε c ~ 0.8% leads to a sharp increase in the coherence of the properties of a charge density wave (CDW), which manifests itself in its motion in fields higher than threshold field E t . During uniaxial elongation, TaS3 is shown to exhibit the following unusual properties even in weak fields: Peierls transition temperature T P depends nonmonotonically on ε, one-dimensional fluctuations weaken near T P , and the coherence length of a charge density increases at T < T P . Investigations in fields higher than E t show that the ultracoherent properties of CDW exist in a wide temperature range and are retained when temperature increases up to T P . These properties of CDW make it possible to observe a sharp increase in E t near T P and an almost jumplike increase in E t at T < 90 K. The increase in E t at T P is explained by a decrease in the coherence volume of CDW because of a fluctuational suppression of the Peierls gap.

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Copyright information

© Pleiades Publishing, Inc. 2017

Authors and Affiliations

  • S. G. Zybtsev
    • 1
  • V. Ya. Pokrovskii
    • 1
    Email author
  • O. M. Zhigalina
    • 2
  • D. N. Khmelenin
    • 2
  • D. Starešinić
    • 3
  • S. Šturm
    • 4
  • E. Tchernychova
    • 4
  1. 1.Kotel’nikov Institute of Radio Engineering and ElectronicsRussian Academy of SciencesMoscowRussia
  2. 2.Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,”Russian Academy of SciencesMoscowRussia
  3. 3.Institute of PhysicsZagrebCroatia
  4. 4.National Institute of ChemistryLjubljanaSlovenia

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