Huge Upper Critical Field and Electronic Instability in Pressure-induced Superconductor CeIrSi<SUB>3</SUB> without Inversion Symmetry in the Crystal Structure

• Settai Rikio

  Graduate School of Science, Osaka University

• Miyauchi Yuichiro

  Graduate School of Science, Osaka University

• Takeuchi Tetsuya

  Low Temperature Center, Osaka University

• Lévy Florence

  Grenoble High Magnetic Field Laboratory, CNRS

• Sheikin Ilya

  Grenoble High Magnetic Field Laboratory, CNRS

• Onuki Yoshichika

  Graduate School of Science, Osaka University

Bibliographic Information

Other Title

• Huge upper critical field and electronic instability in pressure-induced superconductor CeIrSi3 without inversion symmetry in the crystal structure

Abstract

We measured low-temperature electrical resistivity in a magnetic field as a function of pressure, and studied the superconducting property of CeIrSi₃ with a non-centrosymmetric tetragonal structure. CeIrSi₃ is an antiferromagnet with a Néel temperature T_N=5.0 K at ambient pressure, but the antiferromagnetic ordering disappears completely at a pressure P_c=2.25 GPa. Superconductivity appears in a wide pressure region from 1.8 to about 3.5 GPa, with a maximum transition temperature T_sc\\simeq1.6 K at P_c^*\\simeq2.63 GPa. At around P_c^*, the upper critical field H_c2 for the magnetic field H along the [0 0 1] direction is not destroyed by spin polarization based on Zeeman coupling but possesses an upturn curvature below 1 K, revealing a divergent tendency of H_c2 at P_c^*, with a huge H_c2(0)\\simeq450 kOe. On the other hand, the upper critical field for H||[110] indicates the tendency of Pauli paramagnetic suppression, with H_c2(0)=95 kOe at 2.65 GPa. This might be a combined phenomenon between the electronic instability at P_c^* and the characteristic superconducting property without inversion symmetry in the tetragonal structure.

Journal

• Journal of the Physical Society of Japan

  Journal of the Physical Society of Japan 77 (7), 073705-073705, 2008

  THE PHYSICAL SOCIETY OF JAPAN

Keywords

• CeIrSi<SUB>3</SUB>
• upper critical field
• non-centrosymmetric superconductor
• strong coupling superconductor
• quantum critical point

Details

• CRID: 1390001204197725952
• NII Article ID: 130005436493
• NII Article ID: 110006821286
• NII Article ID: 210000107306
• NII Book ID: AA00704814
• DOI: 10.1143/jpsj.77.073705
• BIBCODE: 2008JPSJ...77g3705S
• ISSN: 13474073
• ISSN: 00319015
• ISSN: http://id.crossref.org/issn/00319015
• NDL BIB ID: 9576771
• Web Site: http://id.ndl.go.jp/bib/9576771
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9576771
• Web Site: http://journals.jps.jp/doi/pdf/10.1143/JPSJ.77.073705
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed