Superconductivity in a new layered triangular-lattice system Li₂IrSi₂

• Horigane, K

• Takeuchi, K

• Hyakumura, D

• Horie, R

• Sato, T

• Muranaka, T

• Kawashima, K

• Ishii, H

• Kubozono, Y

• Orimo, S

• Isobe, M

• Akimitsu, J

書誌事項

タイトル別名

• Superconductivity in a new layered triangular-lattice system Li2IrSi2

抄録

We report on the crystal structure and superconducting properties of a novel iridium-silicide, namely Li2IrSi2. It has a Ag2NiO2-type structure (space group R-3m) with the lattice parameters a = 4.028 30(6) Å and c = 13.161 80(15) Å. The crystal structure comprises IrSi2 and double Li layers stacked alternately along the c-axis. The IrSi2 layer includes a two-dimensional Ir equilateral-triangular lattice. Electrical resistivity and static magnetic measurements revealed that Li2IrSi2 is a type-II superconductor with critical temperature (Tc) of 3.3 K. We estimated the following superconducting parameters: lower critical field Hc1(0) ~ 42 Oe, upper critical field Hc2(0) ~ 1.7 kOe, penetration depth λ0 ~ 265 nm, coherence length ξ0 ~ 44 nm, and Ginzburg–Landau parameter κGL ~ 6.02. The specific-heat data suggested that superconductivity in Li2IrSi2 could be attributed to weak-coupling Cooper pairs.

収録刊行物

• New Journal of Physics

  New Journal of Physics 21 093056-, 2019-09-24

  IOP Publishing

キーワード

• supreconductivity
• iridium-silicide
• spin–orbit coupling

詳細情報

• CRID: 1050850475706789120
• NII論文ID: 120006999364
• ISSN: 13672630
• DOI: 10.1088/1367-2630/ab4159
• Web Site: https://ousar.lib.okayama-u.ac.jp/61544
• Web Site: http://iopscience.iop.org/article/10.1088/1367-2630/ab4159
• Web Site: http://iopscience.iop.org/article/10.1088/1367-2630/ab4159/pdf
• Web Site: https://iopscience.iop.org/article/10.1088/1367-2630/ab4159/pdf
• Web Site: https://iopscience.iop.org/article/10.1088/1367-2630/ab4159
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • Crossref
  • CiNii Articles
  • KAKEN