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

Abstract

The first-order transition at $T_0=270$ 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 $T_0$, 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 $T_0$. 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.

11 pages, 3 figures

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Cited by in corpus (1)

• Superconducting dome associated with the suppression and re-emergence of charge density wave states upon sulfur substitution in CuIr2Te4 chalcogenides