TY - JOUR
T1 - Charge density wave and superconductivity of RPt2Si2 (R = Y, La, Nd, and Lu)
AU - Nagano, Yutaro
AU - Araoka, Nobutaka
AU - Mitsuda, Akihiro
AU - Yayama, Hideki
AU - Wada, Hirofumi
AU - Ichihara, Masaki
AU - Isobe, Masahiko
AU - Ueda, Yutaka
PY - 2013/6
Y1 - 2013/6
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.
AB - 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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U2 - 10.7566/JPSJ.82.064715
DO - 10.7566/JPSJ.82.064715
M3 - Article
AN - SCOPUS:84878952338
SN - 0031-9015
VL - 82
JO - journal of the physical society of japan
JF - journal of the physical society of japan
IS - 6
M1 - 064715
ER -