Observation of symmetry lowering associated with the metal-insulator transition in SmRu4P12 by 101Ru-NQR

Satoru Masaki; Takeshi Mito; Masayuki Takemura; Shinji Wada; Hisatomo Harima; Daisuke Kikuchi; Hideyuki Sato; Hitoshi Sugawara; Naoya Takeda; Guo Qing Zheng

doi:10.1143/JPSJ.76.043714

Observation of symmetry lowering associated with the metal-insulator transition in SmRu₄P₁₂ by ¹⁰¹Ru-NQR

Satoru Masaki, Takeshi Mito, Masayuki Takemura, Shinji Wada, Hisatomo Harima, Daisuke Kikuchi, Hideyuki Sato, Hitoshi Sugawara, Naoya Takeda, Guo Qing Zheng

Research output: Contribution to journal › Article › peer-review

30 Citations (Scopus)

Abstract

We report the results of NQR (nuclear quadrupole resonance) study on SmRu₄P₁₂, one of a few candidates for materials showing octupolar ordering. In this study, we firstly succeeded in observing the ¹⁰¹Ru-NQR signal in filled skutterudite compounds RRu ₄P₁₂ (R: rare earth). A single ¹⁰¹Ru-NQR signal splits into two resonance lines, having intensity ratio of 3:1, just below the metal-insulator (M-I) transition temperature of 16.5 K. This result gives convincing evidence for symmetry lowering in the ordered state of this compound, namely the cubic Im3 space group for the filled skutterudite compounds is lowered to the trigonal R3. The model of the ordered structure characterized by a wave vector q = (1, 0, 0) satisfactorily explains the observed phenomena in the present study and the M-I transition in this compound.

Original language	English
Article number	043714
Journal	journal of the physical society of japan
Volume	76
Issue number	4
DOIs	https://doi.org/10.1143/JPSJ.76.043714
Publication status	Published - Apr 2007

Keywords

Filled skutterudite
Metal-insulator transition
Multipolar ordering
NQR
SmRuP

ASJC Scopus subject areas

Physics and Astronomy(all)

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Observation of symmetry lowering associated with the metal-insulator transition in SmRu₄P₁₂ by ¹⁰¹Ru-NQR. / Masaki, Satoru; Mito, Takeshi; Takemura, Masayuki; Wada, Shinji; Harima, Hisatomo; Kikuchi, Daisuke; Sato, Hideyuki; Sugawara, Hitoshi; Takeda, Naoya; Zheng, Guo Qing.

In: journal of the physical society of japan, Vol. 76, No. 4, 043714, 04.2007.

Research output: Contribution to journal › Article › peer-review

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title = "Observation of symmetry lowering associated with the metal-insulator transition in SmRu4P12 by 101Ru-NQR",

abstract = "We report the results of NQR (nuclear quadrupole resonance) study on SmRu4P12, one of a few candidates for materials showing octupolar ordering. In this study, we firstly succeeded in observing the 101Ru-NQR signal in filled skutterudite compounds RRu 4P12 (R: rare earth). A single 101Ru-NQR signal splits into two resonance lines, having intensity ratio of 3:1, just below the metal-insulator (M-I) transition temperature of 16.5 K. This result gives convincing evidence for symmetry lowering in the ordered state of this compound, namely the cubic Im3 space group for the filled skutterudite compounds is lowered to the trigonal R3. The model of the ordered structure characterized by a wave vector q = (1, 0, 0) satisfactorily explains the observed phenomena in the present study and the M-I transition in this compound.",

keywords = "Filled skutterudite, Metal-insulator transition, Multipolar ordering, NQR, SmRuP",

author = "Satoru Masaki and Takeshi Mito and Masayuki Takemura and Shinji Wada and Hisatomo Harima and Daisuke Kikuchi and Hideyuki Sato and Hitoshi Sugawara and Naoya Takeda and Zheng, {Guo Qing}",

year = "2007",

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doi = "10.1143/JPSJ.76.043714",

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AU - Masaki, Satoru

AU - Mito, Takeshi

AU - Takemura, Masayuki

AU - Wada, Shinji

AU - Harima, Hisatomo

AU - Kikuchi, Daisuke

AU - Sato, Hideyuki

AU - Sugawara, Hitoshi

AU - Takeda, Naoya

AU - Zheng, Guo Qing

PY - 2007/4

Y1 - 2007/4

N2 - We report the results of NQR (nuclear quadrupole resonance) study on SmRu4P12, one of a few candidates for materials showing octupolar ordering. In this study, we firstly succeeded in observing the 101Ru-NQR signal in filled skutterudite compounds RRu 4P12 (R: rare earth). A single 101Ru-NQR signal splits into two resonance lines, having intensity ratio of 3:1, just below the metal-insulator (M-I) transition temperature of 16.5 K. This result gives convincing evidence for symmetry lowering in the ordered state of this compound, namely the cubic Im3 space group for the filled skutterudite compounds is lowered to the trigonal R3. The model of the ordered structure characterized by a wave vector q = (1, 0, 0) satisfactorily explains the observed phenomena in the present study and the M-I transition in this compound.

AB - We report the results of NQR (nuclear quadrupole resonance) study on SmRu4P12, one of a few candidates for materials showing octupolar ordering. In this study, we firstly succeeded in observing the 101Ru-NQR signal in filled skutterudite compounds RRu 4P12 (R: rare earth). A single 101Ru-NQR signal splits into two resonance lines, having intensity ratio of 3:1, just below the metal-insulator (M-I) transition temperature of 16.5 K. This result gives convincing evidence for symmetry lowering in the ordered state of this compound, namely the cubic Im3 space group for the filled skutterudite compounds is lowered to the trigonal R3. The model of the ordered structure characterized by a wave vector q = (1, 0, 0) satisfactorily explains the observed phenomena in the present study and the M-I transition in this compound.

KW - Filled skutterudite

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