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Second-order structural transition in (Ca$$_{0.5}$$Sr$$_{0.5}$$)$$_3$$Rh$$_4$$Sn$$_{13}$$

(Ca$$_{0.5}$$Sr$$_{0.5}$$)$$_3$$Rh$$_4$$Sn$$_{13}$$における2次構造相転移

Cheung, Y. W.*; Hu, Y. J.*; Goh, S. K.*; 金子 耕士   ; 筒井 智嗣; Logg, P. W.*; Grosche, F. M.*; 金川 響*; 谷奥 泰明*; 今井 正樹*; 松元 卓也*; 吉村 一良*

Cheung, Y. W.*; Hu, Y. J.*; Goh, S. K.*; Kaneko, Koji; Tsutsui, Satoshi; Logg, P. W.*; Grosche, F. M.*; Kanagawa, Hibiki*; Tanioku, Yasuaki*; Imai, Masaki*; Matsumoto, Takuya*; Yoshimura, Kazuyoshi*

(Ca$$_{0.5}$$Sr$$_{0.5}$$)$$_3$$Rh$$_4$$Sn$$_{13}$$ is a member of the substitution series (Ca$$_{x}$$Sr$$_{1-x}$$)$$_3$$Rh$$_4$$Sn$$_{13}$$ which has recently been argued to feature a structural quantum critical point at $$x_c$$ = 0.9. In the stoichiometric compound Sr$$_{3}$$Rh$$_{4}$$Sn$$_{13}$$, the structural transition at $$T^*$$ $$approx$$ 138 K has been shown to be a second-order phase transition. Moving towards xc, we examine the character of the structural transition in (Ca$$_{0.5}$$Sr$$_{0.5}$$)$$_3$$Rh$$_4$$Sn$$_{13}$$ (i.e. $$x$$ = 0.5, $$T^*$$ $$approx$$ 55 K) using electrical resistivity, heat capacity and X-ray scattering. The absence of the thermal hysteresis in specific heat around $$T^*$$, and the continuous evolution of the superlattice reflection detected by X-ray diffraction are consistent with the scenario that the structural transition associated with a modulation vector $$q$$ = (0.5, 0.5, 0) in (Ca$$_{0.5}$$Sr$$_{0.5}$$)$$_3$$Rh$$_4$$Sn$$_{13}$$ remains second-order on approaching the quantum critical point.

使用言語

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English

掲載資料名

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Journal of Physics; Conference Series

巻

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807

号

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3

ページ数

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p.032002_1 - 032002_4

発行年月

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2017/04

発表会議名

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International Conference on Strongly Correlated Electron Systems (SCES 2016)

開催年月

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2016/05

開催都市

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Hangzhou

開催国

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China

キーワード

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no keyword

特許データ

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PDF

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BB2016-0329.pdf:0.86MB

論文URL

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https://doi.org/10.1088/1742-6596/807/3/032002

研究データの公開先DOI

 :

使用施設

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SPring-8(大型放射光施設)

広報プレスリリース

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論文解説記事
(成果普及情報誌)

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受委託・共同研究相手機関

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Access

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- Accesses

InCites™

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パーセンタイル：83.59

分野：Physics, Condensed Matter

Altmetrics

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