Possibility of charge density wave transition in a SrPt₂Sb₂superconductor

Abstract

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.

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

“…The increase of Δχ (see table 3) with increasing x points to the expanding of the bandwidth at the Fermi level caused by the replacement of Te by S. The increase of both T MI and Δχ reveal that the Peierls-like phase transition is enhanced as a result of the lattice reduction [17]. One more obvious feature is that all samples exhibit the magnetization's upturn at low temperatures ascribed to the Curie paramagnetism [17,39], which may be produced in lattice defects [17,40,41] or paramagnetic impurities [42,43]. Thus, the following formula can be used for fitting the magnetic susceptibility below T MI : χ = χ 0 + C T , where χ 0 represents the magnetic susceptibility excluding the Curie paramagnetism; C is the Curie parameter.…”

“…[17] One more obvious feature is that all samples exhibit the magnetization's upturn at low temperatures ascribed to the Curie paramagnetism, [17,39] which may be produced in lattice defects [17,40,41] or paramagnetic impurities. [42,43] Thus, the following formula can be used for fitting the magnetic susceptibility below TMI:…”