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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17 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 Tc of 3.8 K, displaying a structure type that no previous superconductors have been reported to have.

Original languageEnglish
Article number093706
Journaljournal of the physical society of japan
Volume83
Issue number9
DOIs
Publication statusPublished - Sep 15 2014

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Pyon, S., Kudo, K., Matsumura, J. I., Ishii, H., Matsuo, G., Nohara, M., Hojo, H., Oka, K., Azuma, M., Garlea, V. O., Kodama, K., & Shamoto, S. I. (2014). Superconductivity in noncentrosymmetric iridium silicide Li2IrSi3. journal of the physical society of japan, 83(9), [093706]. https://doi.org/10.7566/JPSJ.83.093706