Charge density wave and superconductivity of RPt2Si2 (R = Y, La, Nd, and Lu)

Yutaro Nagano, Nobutaka Araoka, Akihiro Mitsuda, Hideki Yayama, Hirofumi Wada, Masaki Ichihara, Masahiko Isobe, Yutaka Ueda

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The temperature dependence of electrical resistivity and magnetic susceptibility was studied for RPt2Si2 compounds with R = Y, La, Nd, and Lu. LaPt2Si2 and NdPt2Si2 show steps in the resistivity vs temperature curve at T* = 112 and 77 K, respectively. We performed X-ray diffraction and selected-area electron diffraction (SAED) measurements for LaPt2Si2 at low temperatures. It was found that LaPt2Si2 undergoes a structural transition from tetragonal to orthorhombic at T*. Moreover, (n/3, 0, 0) superlattice reflections with n = 1 and 2 were observed at 10K in the SAED patterns. These results strongly suggest the formation of a charge density wave (CDW) in LaPt2Si 2 below T. On the other hand, the compounds R = Y, La, and Lu were found to show superconductivity below 1.5-1.9 K. The origin of a CDW and its coexistence with superconductivity in RPt2Si2 are discussed.

Original languageEnglish
Article number064715
Journaljournal of the physical society of japan
Issue number6
Publication statusPublished - Jun 2013

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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