Crystal growth, structural and physical properties of the 5d noncentrosymmetric LaOsSi3

doi:10.1088/1674-1056/22/10/108103

中国物理B ›› 2013, Vol. 22 ›› Issue (10): 108103-108103.doi: 10.1088/1674-1056/22/10/108103

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇下一篇

Crystal growth, structural and physical properties of the 5d noncentrosymmetric LaOsSi₃

张旭^{a b}, 苗杉杉^b, 王瀑^b, 郑萍^b, 尹文龙^c, 姚吉勇^c, 姜宏伟^a, 王海^a, 石友国^b

a Department of Physics, Capital Normal University, Beijing 100048, China;
b Beijing National Laboratory for Condensed Matter Physics & Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
c Center for Crystal Research and Development, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China

收稿日期:2013-07-10 修回日期:2013-08-02 出版日期:2013-08-30 发布日期:2013-08-30
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11274367, 10904097, and 11274233) and Chinese Academy of Sciences.

Crystal growth, structural and physical properties of the 5d noncentrosymmetric LaOsSi₃

Zhang Xu (张旭)^{a b}, Miao Shan-Shan (苗杉杉)^b, Wang Pu (王瀑)^b, Zheng Ping (郑萍)^b, Yin Wen-Long (尹文龙)^c, Yao Ji-Yong (姚吉勇)^c, Jiang Hong-Wei (姜宏伟)^a, Wang Hai (王海)^a, Shi You-Guo (石友国)^b

a Department of Physics, Capital Normal University, Beijing 100048, China;
b Beijing National Laboratory for Condensed Matter Physics & Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
c Center for Crystal Research and Development, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China

Received:2013-07-10 Revised:2013-08-02 Online:2013-08-30 Published:2013-08-30
Contact: Wang Hai, Shi You-Guo E-mail:wanghai@mail.cnu.edu.cn;ygshi@aphy.iphy.ac.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11274367, 10904097, and 11274233) and Chinese Academy of Sciences.

摘要/Abstract

摘要： LaOsSi₃ single crystals are synthesized for the first time by an arc melting method. The crystal features a tetragonal BaNiSn₃-type structure (space group I4mm) which lacks inversion symmetry along the crystallographic c axis and is isostructural with the intensively studied Rashba-type noncentrosymmetric superconductors LaRhSi₃ and LaIrSi₃. Unlike LaRhSi₃ and LaIrSi₃ displaying superconductivity, LaOsSi₃ shows only metallic behavior over the measured temperature range of 2 K-300 K. The Sommerfeld coefficient γ derived from specific heat is 5.76 mJ·mol^-1·K^-2, indicating that LaOsSi₃ has a weak electronic correlation effect. The absence of superconductivity in LaOsSi₃ may lie in the Os 5d bands in the electronic structure. If it is true, it would be useful to provide complementary knowledge in understanding the relation between conduction and the d bands of M in LaMSi₃ compounds (M=transition metals).

关键词: noncentrosymmetric compound, LaOsSi₃, structural and physical properties

Abstract: LaOsSi₃ single crystals are synthesized for the first time by an arc melting method. The crystal features a tetragonal BaNiSn₃-type structure (space group I4mm) which lacks inversion symmetry along the crystallographic c axis and is isostructural with the intensively studied Rashba-type noncentrosymmetric superconductors LaRhSi₃ and LaIrSi₃. Unlike LaRhSi₃ and LaIrSi₃ displaying superconductivity, LaOsSi₃ shows only metallic behavior over the measured temperature range of 2 K-300 K. The Sommerfeld coefficient γ derived from specific heat is 5.76 mJ·mol^-1·K^-2, indicating that LaOsSi₃ has a weak electronic correlation effect. The absence of superconductivity in LaOsSi₃ may lie in the Os 5d bands in the electronic structure. If it is true, it would be useful to provide complementary knowledge in understanding the relation between conduction and the d bands of M in LaMSi₃ compounds (M=transition metals).

Key words: noncentrosymmetric compound, LaOsSi₃, structural and physical properties

中图分类号: (New materials: theory, design, and fabrication)

81.05.Zx

81.10.Fq (Growth from melts; zone melting and refining) 82.75.Fq (Synthesis, structure determination, structure modeling)

张旭, 苗杉杉, 王瀑, 郑萍, 尹文龙, 姚吉勇, 姜宏伟, 王海, 石友国. Crystal growth, structural and physical properties of the 5d noncentrosymmetric LaOsSi₃[J]. 中国物理B, 2013, 22(10): 108103-108103.

Zhang Xu (张旭), Miao Shan-Shan (苗杉杉), Wang Pu (王瀑), Zheng Ping (郑萍), Yin Wen-Long (尹文龙), Yao Ji-Yong (姚吉勇), Jiang Hong-Wei (姜宏伟), Wang Hai (王海), Shi You-Guo (石友国). Crystal growth, structural and physical properties of the 5d noncentrosymmetric LaOsSi₃[J]. Chin. Phys. B, 2013, 22(10): 108103-108103.

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Crystal growth, structural and physical properties of the 5d noncentrosymmetric LaOsSi₃

Crystal growth, structural and physical properties of the 5d noncentrosymmetric LaOsSi₃

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