Superconductivity in noncentrosymmetric iridium silicide Li2IrSi3

Sunseng Pyon; Kazutaka Kudo; Jun Ichi Matsumura; Hiroyuki Ishii; Genta Matsuo; Minoru Nohara; Hajime Hojo; Kengo Oka; Masaki Azuma; V. Ovidiu Garlea; Katsuaki Kodama; Shin Ichi Shamoto

doi:10.7566/JPSJ.83.093706

Superconductivity in noncentrosymmetric iridium silicide Li₂IrSi₃

Sunseng Pyon, Kazutaka Kudo, Jun Ichi Matsumura, Hiroyuki Ishii, Genta Matsuo, Minoru Nohara, Hajime Hojo, Kengo Oka, Masaki Azuma, V. Ovidiu Garlea, Katsuaki Kodama, Shin Ichi Shamoto

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

25 Citations (Scopus)

Abstract

The effects of lithium absorption on the crystal structure and electronic properties of IrSi ₃, a binary silicide with a noncentrosymmetric crystal structure, were studied. X-ray and neutron diffraction experiments revealed that hexagonal IrSi₃ (space group P6₃mc) transforms into trigonal Li₂IrSi₃ (space group P31c) upon lithium absorption. The structure of Li₂IrSi ₃ is found to consist of a planar kagome network of silicon atoms with Li and Ir spaced at unequal distances between the kagome layers, resulting in a polar structure along the c-axis. Li₂IrSi₃ exhibited type-II superconductivity with a transition temperature T_c of 3.8 K, displaying a structure type that no previous superconductors have been reported to have.

Original language	English
Article number	093706
Journal	journal of the physical society of japan
Volume	83
Issue number	9
DOIs	https://doi.org/10.7566/JPSJ.83.093706
Publication status	Published - Sep 15 2014

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Physics and Astronomy(all)

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Superconductivity in noncentrosymmetric iridium silicide Li₂IrSi₃. / Pyon, Sunseng; Kudo, Kazutaka; Matsumura, Jun Ichi; Ishii, Hiroyuki; Matsuo, Genta; Nohara, Minoru; Hojo, Hajime; Oka, Kengo; Azuma, Masaki; Garlea, V. Ovidiu; Kodama, Katsuaki; Shamoto, Shin Ichi.

In: journal of the physical society of japan, Vol. 83, No. 9, 093706, 15.09.2014.

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

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abstract = "The effects of lithium absorption on the crystal structure and electronic properties of IrSi 3, a binary silicide with a noncentrosymmetric crystal structure, were studied. X-ray and neutron diffraction experiments revealed that hexagonal IrSi3 (space group P63mc) transforms into trigonal Li2IrSi3 (space group P31c) upon lithium absorption. The structure of Li2IrSi 3 is found to consist of a planar kagome network of silicon atoms with Li and Ir spaced at unequal distances between the kagome layers, resulting in a polar structure along the c-axis. Li2IrSi3 exhibited type-II superconductivity with a transition temperature Tc of 3.8 K, displaying a structure type that no previous superconductors have been reported to have.",

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AU - Pyon, Sunseng

AU - Kudo, Kazutaka

AU - Matsumura, Jun Ichi

AU - Ishii, Hiroyuki

AU - Matsuo, Genta

AU - Nohara, Minoru

AU - Hojo, Hajime

AU - Oka, Kengo

AU - Azuma, Masaki

AU - Garlea, V. Ovidiu

AU - Kodama, Katsuaki

AU - Shamoto, Shin Ichi

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N2 - The effects of lithium absorption on the crystal structure and electronic properties of IrSi 3, a binary silicide with a noncentrosymmetric crystal structure, were studied. X-ray and neutron diffraction experiments revealed that hexagonal IrSi3 (space group P63mc) transforms into trigonal Li2IrSi3 (space group P31c) upon lithium absorption. The structure of Li2IrSi 3 is found to consist of a planar kagome network of silicon atoms with Li and Ir spaced at unequal distances between the kagome layers, resulting in a polar structure along the c-axis. Li2IrSi3 exhibited type-II superconductivity with a transition temperature Tc of 3.8 K, displaying a structure type that no previous superconductors have been reported to have.

AB - The effects of lithium absorption on the crystal structure and electronic properties of IrSi 3, a binary silicide with a noncentrosymmetric crystal structure, were studied. X-ray and neutron diffraction experiments revealed that hexagonal IrSi3 (space group P63mc) transforms into trigonal Li2IrSi3 (space group P31c) upon lithium absorption. The structure of Li2IrSi 3 is found to consist of a planar kagome network of silicon atoms with Li and Ir spaced at unequal distances between the kagome layers, resulting in a polar structure along the c-axis. Li2IrSi3 exhibited type-II superconductivity with a transition temperature Tc of 3.8 K, displaying a structure type that no previous superconductors have been reported to have.

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Superconductivity in noncentrosymmetric iridium silicide Li₂IrSi₃

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