Journal of Low Temperature Physics

, Volume 188, Issue 1–2, pp 1–10

Charge Density Wave and Crystal Structure of \(\hbox {K}_{x}\hbox {WO}_{3}\) (\(x=0.20\) and 0.22) Prepared by Hybrid Microwave Method

  • Runze Chen
  • Chaojun Gao
  • Kun Bu
  • Xiaoyu Hao
  • Zichen Wang
  • Lianjun Wen
  • Juan Guo
  • Mingju Chao
  • Erjun Liang
  • Lihong Yang
  • Cheng Dong
Article

DOI: 10.1007/s10909-017-1762-6

Cite this article as:
Chen, R., Gao, C., Bu, K. et al. J Low Temp Phys (2017) 188: 1. doi:10.1007/s10909-017-1762-6
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Abstract

Potassium tungsten bronzes \(\hbox {K}_{x}\hbox {WO}_{3}\) (\(x=0.20\) and 0.22) with the coexistence of charge density wave (CDW) and superconductivity (SC) were prepared from \(\hbox {K}_{2}\hbox {WO}_{4},\, \hbox {WO}_{3}\) and W powders using a hybrid microwave method. The structure refinement confirmed that all samples had a pure hexagonal phase with the space group of \(P6_{3}\)/mcm. The distortion degree of W–O octahedron declines with x and is independent of synthesis condition for the same x (=0.20). The CDW transition is studied as a function of residual resistivity ratio. By increasing the crystallinity of sample, this transition can be suppressed, which is probably attributed to the interaction between CDW and defects in crystallites. The CDW transition temperature increases with x, which may be related to the decline of the distortion degree of W–O octahedron. The competition between CDW and SC is observed according to the resistivity and magnetization measurements.

Keywords

Potassium tungsten bronzes Charge density wave W–O octahedron Defects 

Supplementary material

10909_2017_1762_MOESM1_ESM.doc (172 kb)
Supplementary material 1 (doc 172 KB)

Funding information

Funder NameGrant NumberFunding Note
National Natural Science Foundation of China
  • 51302249
  • 11574276

Copyright information

© Springer Science+Business Media New York 2017

Authors and Affiliations

  • Runze Chen
    • 1
  • Chaojun Gao
    • 1
  • Kun Bu
    • 1
  • Xiaoyu Hao
    • 1
  • Zichen Wang
    • 1
  • Lianjun Wen
    • 1
  • Juan Guo
    • 1
  • Mingju Chao
    • 1
  • Erjun Liang
    • 1
  • Lihong Yang
    • 2
  • Cheng Dong
    • 2
  1. 1.Key Laboratory of Materials Physics of Ministry of Education of China, School of Physical Science and EngineeringZhengzhou UniversityZhengzhouChina
  2. 2.National Laboratory for Superconductivity, Institute of PhysicsChinese Academy of SciencesBeijingChina

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