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

35 Scopus citations

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

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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",

language = "English",

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TY - JOUR

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.

UR - https://www.scopus.com/pages/publications/84924891878

U2 - 10.7566/JPSJ.83.093706

DO - 10.7566/JPSJ.83.093706

M3 - Article

AN - SCOPUS:84924891878

SN - 0031-9015

VL - 83

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

IS - 9

M1 - 093706

ER -

Superconductivity in noncentrosymmetric iridium silicide Li₂IrSi₃

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