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

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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 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
State	Published - Sep 15 2014

Funding

Funders	Funder number
Japan Society for the Promotion of Science	26800180, 25400372, 26287082, 25287094, 24510129
Japan Society for the Promotion of Science

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10.7566/JPSJ.83.093706

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title = "Superconductivity in noncentrosymmetric iridium silicide Li2IrSi3",

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.",

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

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doi = "10.7566/JPSJ.83.093706",

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T1 - Superconductivity in noncentrosymmetric iridium silicide Li2IrSi3

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

PY - 2014/9/15

Y1 - 2014/9/15

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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JF - Journal of the Physical Society of Japan

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ER -

Superconductivity in noncentrosymmetric iridium silicide Li₂IrSi₃

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