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

Research output: Contribution to journalArticle

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Abstract

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
Volume82
Issue number6
DOIs
Publication statusPublished - Jun 1 2013

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superconductivity
electron diffraction
magnetic permeability
electrical resistivity
diffraction patterns
temperature dependence
curves
diffraction
x rays
temperature

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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Charge density wave and superconductivity of RPt2Si2 (R = Y, La, Nd, and Lu). / Nagano, Yutaro; Araoka, Nobutaka; Mitsuda, Akihiro; Yayama, Hideki; Wada, Hirofumi; Ichihara, Masaki; Isobe, Masahiko; Ueda, Yutaka.

In: journal of the physical society of japan, Vol. 82, No. 6, 064715, 01.06.2013.

Research output: Contribution to journalArticle

Nagano, Yutaro ; Araoka, Nobutaka ; Mitsuda, Akihiro ; Yayama, Hideki ; Wada, Hirofumi ; Ichihara, Masaki ; Isobe, Masahiko ; Ueda, Yutaka. / Charge density wave and superconductivity of RPt2Si2 (R = Y, La, Nd, and Lu). In: journal of the physical society of japan. 2013 ; Vol. 82, No. 6.
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AU - Nagano, Yutaro

AU - Araoka, Nobutaka

AU - Mitsuda, Akihiro

AU - Yayama, Hideki

AU - Wada, Hirofumi

AU - Ichihara, Masaki

AU - Isobe, Masahiko

AU - Ueda, Yutaka

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N2 - 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.

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