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

Graduate School of Natural Science and Technology

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

28 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

ASJC Scopus subject areas

Physics and Astronomy(all)

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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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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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Superconductivity in noncentrosymmetric iridium silicide Li₂IrSi₃

Abstract

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