Possibility of charge density wave transition in SrPt$_2$Sb$_2$ superconductor

Soshi Ibuka; Motoharu Imai

doi:10.1088/0953-8984/28/16/165702

Possibility of charge density wave transition in SrPt$_2$Sb$_2$ superconductor

Superconductivity 2016-03-31 v2

Authors: Soshi Ibuka , Motoharu Imai

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Abstract

The first-order transition at $T_{\rm 0} = 270$ K for the platinum-based SrPt $_2$ Sb $_2$ superconductor was investigated using X-ray diffraction and magnetic susceptibility measurements. When polycrystalline SrPt $_2$ Sb $_2$ was cooled down through $T_{\rm 0}$ , the structure was transformed from monoclinic to a modulated orthorhombic structure, and no magnetic order was formed, which illustrates the possibility of a charge density wave (CDW) transition at $T_{\rm 0}$ . SrPt $_2$ Sb $_2$ can thus be a new example to examine the interplay of CDW and superconductivity in addition to SrPt $_2$ As $_2$ , BaPt $_2$ As $_2$ and LaPt $_2$ Si $_2$ . It is unique that the average structure of the low-temperature phase has higher symmetry than that of the high-temperature phase.

Keywords

charge density wave superconductivity SrPt2Sb2 phase transition x-ray diffraction magnetic susceptibility structural modulation

Cite

@article{arxiv.1601.06479,
  title  = {Possibility of charge density wave transition in SrPt$_2$Sb$_2$ superconductor},
  author = {Soshi Ibuka and Motoharu Imai},
  journal= {arXiv preprint arXiv:1601.06479},
  year   = {2016}
}

Comments

11 pages, 3 figures

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